Answer:
Hamid initially invested $1,125.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:
[tex]E = P*I*t[/tex]
In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After 10 years, Hamid's account earned $900 in interest.
This means that [tex]t = 10, E = 900[/tex]
Interest rate of 0.08:
This means that [tex]I = 0.08[/tex]
How much did Hamid initially invest?
We have to find P. So
[tex]E = P*I*t[/tex]
[tex]900 = P*0.08*10[/tex]
[tex]P = \frac{900}{0.8}[/tex]
[tex]P = 1125[/tex]
Hamid initially invested $1,125.
Isabella runs 3 times per week. She ran for 15 minutes on Monday and 17 minutes on Wednesday. Her coach told her that she had run 80 percent of her goal that week. How many more minutes does she need to run to meet her goal for the week?
Answer
8 More minutes
Step-by-step explanation:
15+ 17 = 32
32/.8 = 40
40 - 32 = 8
What is the shaded area of the figure?
Answer:
329.29... mm²
Step-by-step explanation:
it is the area of the circle minus the area of the white triangle.
what we see as dotted line is on one hand the radius of the circle but also the height of the triangle.
we know the area of a circle is
pi×r²
and the area of a triangle is
baseline×height/2
the baseline of the triangle is clearly the diameter (=2×r) of the circle.
so, we have everything and need only to do the calculations.
the area of the shaded figure is
As = pi×(12.4)² - (2×12.4)×12.4/2 = pi×(12.4)² - 12.4×12.4 =
= pi×(12.4)² - (12.4)² = (pi-1)×(12.4)² = 329.29... mm²
Question 8 of 25 Ajar contains 40 dimes and nickels. The total value of the coins is $2.25. If d = the number of dimes and n= the number of nickels, this is the system of equations din = 40 0.0d + 0.05n = 2.25 How many of each type of coin are there? Solve the system to answer the question
A. 35 dimes and five nickels
B 5 dimes and 35 nickels
C 20 dimes and 20 nickels
D 10 dimes and 30 nickels
Answer:
Hello,
Answer A: 35 dimes and 5 nickels
Step-by-step explanation:
Let say
d the number of dimes
n the number of nickels
There are 25 coins: d+n=25
Total value : 0.1*d+0.05n=2.25
[tex]\left\{\begin {array} {ccc}d+n&=&40\\10*d+5*n&=&225\ multiplied\ by\ 100\\\end {array}\right.\\\\\\\left\{\begin {array} {ccc}n&=&40-d\\10*d+5*(40-d)&=&225\\\end {array}\right.\\\\\\\left\{\begin {array} {ccc}5*d&=&225-200\\n&=&40-d\\\end {array}\right.\\\\\\\left\{\begin {array} {ccc}5*d&=&25\\n&=&40-5\\\end {array}\right.\\\\\\\left\{\begin {array} {ccc}d&=&5\\n&=&35\\\end {array}\right.\\\\Proof:\\5*0.1+35*0.05=0.5+1.75=2.25\\[/tex]
Aisha wants to paint the four walls of her living room.
Each wall is 2.2 m high and 5.5 m long.
One wall has a door of 1.8 m by 0.9 m.
Tins of paint cost £13 per 2 L tin.
Each litre of paint can cover 8 m2 of wall.
There is an offer of: Buy 2 tins get the 3rd at half price.
How much will Aisha pay to paint her living room?
Answer:
£32.50
Step-by-step explanation:
my first question to the teacher : so, no windows in the living room ?
so, it is a square living room with 5.5 m side length.
but each wall is a rectangle of 2.2 × 5.5 m.
for one wall we have to deduct a door area of 1.8×0.9 m.
so, one wall
2.2 × 5.5 = 12.1 m²
4 walls
4 × 12.1 = 48.4 m²
minus one door area
1.8 × 0.9 = 1.62 m²
48.4 - 1.62 = 46.78 m² total paint area
1 L paint covers 8 m².
so, we need 46.78/8 = 5.85 liters.
she gets the paint in 2 L tins. so, she needs 3 tins (6 L).
each tin costs £13.
and because she buys 3 tins, she gets the third one for half the price (13/2 = £6.50).
so, she has to pay
2×13 + 6.50 = 26 + 6.50 = £32.50
use a double angle or half angle identity to find the exact value of each expression
Answer:
Step-by-step explanation:
There are 2 very distinct and important things that we need to know before completing the problem. First is that we are given that the cos of an angle is 1/3 (adjacent/hypotenuse) and it is in the first quadrant. We also need to know that the identity for sin2θ = 2sinθcosθ.
We already know cos θ = 1/3, so we need now find the sin θ. The sin ratio is the side opposite the angle over the hypotenuse, and the side we are missing is the side opposite the angle (we do not need to know the angle; it's irrelevant). Set up a right triangle in the first quadrant and label the base with a 1 (because the base is the side adjacent to the angle), and the hypotenuse with a 3. Find the third side using Pythagorean's Theorem:
[tex]3^2=1^2+y^2[/tex] which simplifies to
[tex]9=1+y^2[/tex] and
[tex]y^2=8[/tex] so
[tex]y=\sqrt{8}=2\sqrt{2}[/tex] so that's the missing side. Now we can easily determine that
[tex]sin\theta=\frac{2\sqrt{2} }{3}[/tex]
Now we have everything we need to fill in the identity for sin2θ:
[tex]2sin\theta cos\theta=2(\frac{2\sqrt{2} }{3})(\frac{1}{3})[/tex] and multiply all of that together to get
[tex]2sin\theta cos\theta=\frac{4\sqrt{2} }{9}[/tex]
which of the following pairs of equations are perpendicular
Answer:
were are the pairs?
 The angle of elevation to a nearby tree from a point on the ground is measured to be 65°. How tall is the tree if the point on the ground is 92 feet from the tree? Round your answer to the nearest hundredth of a
foot if necessary.
Answer:
197.3 feet
Step-by-step explanation:
197.295 rounded to the nearest hundredth is 197.30 or 197.3
The height of the tree if the point on the ground from the tree is 92 feet will be 197.29 feet.
What is a right-angle triangle?It is a type of triangle in which one angle is 90 degrees and it follows the Pythagoras theorem and we can use the trigonometry function. The Pythagoras is the sum of the square of two sides is equal to the square of the longest side.
The angle of elevation to a nearby tree from a point on the ground is measured to be 65°.
The height of the tree if the point on the ground from the tree is 92 feet. Then we have
Let h be the height of the tree. Then we have
[tex]\tan 65^o = \dfrac{h}{92}\\\\ 2.1445\ = \dfrac{h}{92}[/tex]
Then we have
[tex]\rm h = 2.1445 \times 92\\\\h = 197.29\ ft[/tex]
More about the right-angle triangle link is given below.
https://brainly.com/question/3770177
PLEASE HELPPPPP, what is the meaning of 1.5 terms context?
Answer: #2 that's an absolute anser i am not sure if there are more or if this is just a multiple choice question
Step-by-step explanation:
I am having trouble with this problem how do i solve it.
Answer:
90
Step-by-step explanation:
I do not know if this is true or not but i am pretty sure this is perimeter
All triangles sides have to add up to 180
1. add up 25 and 65
2. 180-90=90
Then i think your answer is 90
Please do not give me hate if i did this wrong
What is 8% of $600?
pls provide equation on how you get the answer
Answer:
Step-by-step explanation:
8% = 8/100
So 8% of 600
= (8/100)* 600
= 8 * 6
= $48.
Step-by-step explanation:
8/100×$600
8×6. (Cancelled 600 by 100%)
$48
hope it helps
I DONT UNDERSTAND HELPPPPPPPPP
Answer:
no as all fractions are rational numbers and that is a mixed fraction
Barbara buys
3 boxes of eggs costing £1.20 each
1 jar of mayonnaise costing £1.80
2 loaves of bread
she pays with a £10 note and gets £1.60 change
Barbara works out the cost of 1 loaf bread as £1.40
is she correct? why? you must show your working
Answer
yes it is correct
Step-by-step explanation:
A car travels 600 km in 6 hours. at what rate of speed is the car traveling?
Step-by-step explanation:
100Km/hours......V/T
The length of the side of a regular octagon is 2.5y - 3 units. The perimeter of the octagon is _
units
Answer:
Step-by-step explanation:
1 side = 2.5y - 3
8 sides = 8(2.5y - 3)
8 sides = 20y - 24
Perimeter = 20y - 24
Choose the inequality that could be used to solve the following problem.
Three times a number is at most negative six.
A. 3x ≥ -6
B. 3x < -6
C. 3x > -6
D. 3x ≤ -6
Please HELP!! Will mark brainliest!!!
Answer:
x=6
y=5
Step-by-step explanation:
15x and 90 are vertical angles and vertical angles are equal
15x = 90
Divide by 15
15x/15 = 90/15
x = 6
15x and 5x+12y are corresponding angles and corresponding angles are equal when the lines are parallel
15x= 5x+12y
Subtract 5x
15x-5x = 5x+12y-5x
10x = 12y
10(6) = 12y
60 = 12y
Divide by 12
60/12 = 12y/12
5 = y
Please help me with this on the picture
Answer:
he needs enough butter for a fish pie for 15 people :)
Step-by-step explanation:
What is the range of f(x)=4^x
Answer:
B
Step-by-step explanation:
At - infinity, the function will tend to 0 and at +infinity, the function will tend to +infinity. Those are the two extremas of the function and extremas define the range. Range is all positive real number
Find the length of side BC give your answer to three significant figures
Answer:
19.4 cm
Step-by-step explanation:
Hi there!
This is a right triangle. We're given an angle, the side adjacent to the angle and we're solving for the hypotenuse. Given this information, we can use the cosine ratio:
[tex]cos\theta=\frac{adj}{hyp}[/tex]
Plug in the given angle and side
[tex]cos71=\frac{6.3}{BC}\\BC=\frac{6.3}{cos71} \\BC=19.4[/tex]
Therefore, the length of BC is 19.4 cm when rounded to 3 significant figures.
I hope this helps!
Can someone help me with this math homework please!
Answer:
f(n+1) = f(n) - 5
Step-by-step explanation:
Just find some relationship between 2 numbers that are next to each other.
Write each power as a single power, then evaluate (9
Answer:
Step-by-step explanation:
a. 〖(9^8)〗^0 = 1
b. 〖〖[(-2)〗^4]〗^2 = 256
c. 〖–(3^2)〗^3 = -729
Find the measure of the missing angle using the exterior angle sum theorm.
Answer:
95 degrees
Step-by-step explanation:
First find the angles within the triangle. 180 - 43 - 52 = 85, so the missing angle within the triangle is 85. The exterior angle would be supplementary to that, so 180 - 85 = 95.
Solve the equation -9x -21= 20x -87
Answer:
66/29
Step-by-step explanation:
-9x - 21 = 20x - 87
Add 87 to both sides to cancel out the -87 on the right side:
-9x + 66 = 20x
Add 9x to both sides to cancel out the -9x on the left side:
66 = 29x
Divide both sides by 29 to isolate the variable:
66/29 or 2.275862....
Simplify the following :
1. 8/5 divided by ( 3/4 + 5/6 )
2. (3/2 divided by 8/9) divide 7/16
3. -12/84 divided by 65/13 x 56/49
pls do not spam me
Please answer these questions for me... if you do i will mark you as brainliest, also less points bec there are some people who only reply for points...
Answer:
1. 95/96
2. 27/7
3. -8/245
Explanation:
1. First add together the two fractions 3/4 + 5/6. Find the least common denominator. In this case we can use 12. The 3/4 changes to 9/12 and the 5/6 changes to 10/12. adding these together we get 19/12. Next we divide 8/5 by 19/12. We use the keep, change, flip method to change the divide to multiply. keep the first fraction, change divide into multiply, and then take the reciprocal of the second fraction. You will now do 5/8 x 19/12. We now get 95/96 (I made a mistake in the answers the first time because I was rushing)
2. Divide the 3/2 and the 8/9 first. I will use the KCF (keep, change, flip) method to divide. 3/2 x 9/8 = 27/16 Now we divide the 7/16. After using KCF we can simplify and cross cancel (simplfy after changing the fraction and signs) 27/16 x 16/7 --> 27/1 x 1/7 The answer will come out to be 27/7
3. since there are no parentheses divide first. Use KCF and after you get the answer multiply (it is the same using negative numbers just watch out for signs)
I NEED HELPPPP PLEASE
The population of China is about 1.4 x 10^9 people. Julie grew up in a town that had a population of about 7,000 people. How many times greater is the population of China than Julie's hometown?
Please write your answer in standard notation
Answer:
200,000 times
Step-by-step explanation:
The population of China is about 1.4 × 10⁹ . And the hometown of Julie has a population of 7,000 people . We need to find out how many times greater is the population of China than Julie's hometown .
By Question :-
[tex]\rm\implies Population_{China}= 1.4\times 10^9 [/tex]
[tex]\rm\implies Population_{Hometown}= 7,000 [/tex]
Times by which population of China is more:-
For finding this divide the population of China by population of hometown .[tex]\rm\implies \dfrac{ 1.4 \times 10^9 }{7000} \\\\\rm\implies \dfrac{ 14 \times 10^8}{7\times 10^3}\\\\\rm\implies 2\times 10^{8-3} \\\\\rm\implies 2\times 10^5 \\\\\rm\implies \boxed{\quad \bf 200,000 \quad }[/tex]
Therefore the population of China is greater than 200,000 times .
A triangle has an area of 18ft squared. List all the possible positive integers that could represent its base and height. Use sentences to describe your process.
Answer:
1ft x 36ft
2ft x 18ft
3ft x 12ft
4ft x 9ft
6ft x 6ft
Step-by-step explanation:
A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees
Area of a triangle = 1/2 x base x height
If area is 18ft², then the dimensions of base x height = 18 x 2 = 36
all the possible positive integers that could represent its base and height can be determined be known by determining the factors of 36
factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18, and 36
Possible dimensions of base and heights are :
1ft x 36ft
2ft x 18ft
3ft x 12ft
4ft x 9ft
6ft x 6ft
Joshua has a stored value card with $100
to buy food at a seafood restaurant. If he
orders 1 kg of chilli crab and 4 tiger prawns,
there will be $12 left in the value of the card.
If he orders 2 kg of chilli crab and 2 tiger
prawns, he needs to pay $28 more. How
much is left in the card or how much will he
need to pay if he orders 1.5 kg of chilli crab
and 2 tiger prawns?
Answer:
no money left (0$), but no extra payment either.
Step-by-step explanation:
x = price per kg of crab
y = price per prawn
if he orders the first list, we know $12 will be left on his card, that means the order costs 100 - 12 = $88.
1×x + 4×y = 88
for the second list we know he would have to pay $28 extra, in addition to the $100 in the card.
so, 100 + 28 = $128
2×x + 2×y = 128
x + y = 64
now we have a system of 2 equations with 2 variables. we use one equation to express one variable by the other, and that we use then in the second equation to solve it.
x = 64 - y
(64 - y) + 4y = 88
64 + 3y = 88
3y = 24
y = 24/3 = $8
=>
x = 64 - y = 64 - 8 = $56
so, if he orders 1.5 kg of crab and 2 prawns we get a cost
1.5×56 + 2×8 = 84 + 16 = $100
so, he will not have any money left in the card, but he will not have to pay anything extra either.
Which table of values could be generated by the equation 10x+5y=15? (Will give brainlest and 21 points)
Answer:
(For the image) A
Step-by-step explanation:
what is 3x10x178 I need help asap
Answer:
3x10=30 30x178=5,430
Step-by-step explanation:
[tex]3 \times 10 \times 178 \\ 30 \times 178 \\ 5340 \: \: answer[/tex]