9514 1404 393
Answer:
D
Step-by-step explanation:
In the second quadrant, ...
c = 180° -arcsin(24/25) ≈ 106.26°
In the third quadrant, ...
d = 360° -arccos(-3/4) ≈ 221.41°
Then cos(c+d) = cos(327.67°) ≈ 0.84498
This is a positive irrational number, greater than 21/100, so the only reasonable choice is the last one:
[tex]\dfrac{21+24\sqrt{7}}{100}\approx 0.84498[/tex]
_____
Perhaps you want to work this out using the trig identities.
cos(c) = -√(1 -sin(c)²) = -7/25
sin(d) = -√(1 -cos(d)²) = -(√7)/4
Then the desired cosine is ...
cos(c+d) = cos(c)cos(d) -sin(c)sin(d)
cos(c+d) = (-7/25)(-3/4) -(24/25)(-√7/4)
cos(c+d) = (21 +24√7)/100 . . . . matches choice D
Answer:
D
Step-by-step explanation:
Translate this sentence into an inequality:
Twice the difference of a number and 5 is at least -30.
Answer:
2x -5=-30
2x= 5 -30
2x= 25
x= 25/2
x= 12.5
HELP PLEASE!!!! I ONLY HAVE 3 MORE MATH RIDDLES LEFT!!!!
Answer:
97
Explanation:
Buddy- 6
Hermey-3
____________________________________________________________
It takes Buddy 94 years to be 100 so you would add 94 to both boys ages!
6+94=100 years old!
3+94= 97 years old!
Answer:
He is going to be 50 years old
Step-by-step explanation:
if he was 3 when his brother was 6 then it would mean that when his brother is 100 he should be 50 because that would be half. You can divide it if you want some extra proof :)
Simplify the expression given below.
4(3x−1)−(6x−5)
Answer:
6x+1
Step-by-step explanation:
You would want to distribute and then combine like terms.
Ms. Frank purchased notebooks for $12.57 before tax. If the sales tax on her purchase was 6%, how much money should Ms. Frank have to pay for the notebooks in total.
Answer:
$13.32
Step-by-step explanation:
To find the tax, convert the percentage to decimal form and get 0.06. Multiply 0.06 by 12.57 to get 0.7542. Add this to 12.57 to get 13.3242. When rounded to the nearest hundredths place this becomes $13.32
(5+ w)(w + 4) =
polynomial stanford form
PLEASE HELP WILL GIVE BRAINLIEST.
What is the slope-intercept form of the function described by this table?
x 1 2 3 4
y −2 −6 −10 −14
Enter your answers by filling in the boxes.
y = x +
Aiden earned $184.50 at his job when he worked for 9 hours. What did he earn in one
hour?
Answer:
20.50$ in one hour
Step-by-step explanation:
Just division :)
Kacy is on her freshman volleyball team.she makes 31%of her foul shots,leading her team to 14 wins in 19 games of the season. If kacy took 49 foul shots during the season, how many shots did she make(if necessary, round the the nearest tenth)
Answer:
15.2
Step-by-step explanation:
She makes 31% of her foul shots
she took 49 shots
the number of foul shots is 31% of 49 shots
=31% * 49
=0.31 * 49
= 15.19
rewrite y=-8x+1 in standard form
Answer:
8x+y=1
Step-by-step explanation:
Hope this helps!!
Brainliest if correct please help
Answer:
H
Step-by-step explanation:
Because 20 percent is 24 dollars off and the second option is 30 dollars off and the third is 40 dollars off and 120-40 is 80 dollars so sentence H is correct
Please give me brainiest
Trey pays $22.10 for 2.6 pounds of salmon. what is the price per pound of the salmon?
Answer:
$8.50
Step-by-step explanation:
You divide $22.10 by 2.6 to get the price per pound of salmon.
22.10 ÷ 2.6 = 8.5
What is the result of factoring out the GCF from the expression ( 24 + 36 ) ?
Answer:
6 is the GCF / 6(4+6)
Step-by-step explanation:
You should know your multiples up to 10, so then do some mental math and think about what number could go in each example:
Try 2: 2,4,6,8,10,12,14,16,18,20,24... except at the end we know there is most likely a greater GCF because two even numbers still remain in the parentheses.
This should be pretty fast since you should realize that three wouldnt work and same with five.
Until you see six
6,12,18,24,30,36
Find B U C.
I need help
Answer:
∪ means the whole numbers which is found in them
B and C have the numbers, 3,7, 6, 9, 2, 5
so, B∪C={2, 3, 5, 6, 7, 9)
Step-by-step explanation:
can i have brainliest if it helped : )
Abby bought one package of cookies that weighed 24 ounces and another package that weighed 2 pounds 2 ounces. What was the combined weight of the two packages of cookies she bought?
Answer: If you place 10 packages per box, each box will weigh 10(3 lb 4 oz). This is 30 lb 40 oz. For 4 boxes you would have 4(30 lb 40 oz). This is 120 lb 160 oz. To put you answer in the correct form you need to change the 160 oz to pounds and ounces. 16 oz is equal to 1 pound, so divide 160 by 16. The 160 oz is equivalent to 10 lbs. Therefore the total weight of 4 boxes is 120 + 10 which equals 130 lbs.
In 2020, the United States population is 3.31 x 108. What is this number in standard form?
А
33,100,000
B
331,000,000,000
С
331,000,000
D
3,310,000
anybody know the answer??
Answer:331,000,000
Step-by-step explanation:
A real estate agent sells a house for $92,000. She receives a 6% commission on the sale of the house. How much did she earn on the sale? Round your answer to the nearest cent. Pls help i need thins in less than 5 minuets pls
$5,520.00 there ya go
what is 5x+60y=35
x+y=1.5
Solving the system of equations shows that to make these equations true x=1 and y=0.5
Body temperatures that are 0.9°F above or below 98.6°F are considered normal. What equation can be used to determine the least and greatest normal temperatures? What are Ithe temperatures?
pls help fast
Answer: i got a for your answer choice
Step-by-step explanation:
Can anyone help me with this Midterm Advanced Algebra problem. (DONT ANSWER IF YOUR NOT SURE)
Answer:
-1/2
Step-by-step explanation:
Can someone help me on this! plz help me and tell me how u got the answer.
and plz dont troll.....
Answer: The last choice, 2x + 3y = 10
Step-by-step explanation: This equation will have the same slope. The line will be parallel to the original side , just higher up on the grid.
PLEASE HELP PLEASE EMERGENCY
Answer:First one is first step. 2 is Last step. 3 is fourth step. 4 is second step. 5 is Third step
Step-by-step explanation:
I went down the column
A business man wants to gain more profit every day. If we are going to relate it to a parabola, the vertex should always be at its _______________ to illustrate that his business is always gaining.
a. maximum
b. minimum
c. break-even
d. origin
A private college allows local residents to use athletic facilities such as the gym and the pool for a fee. The college charges a one time registration fee of $25 and also charges a fee of $18 per semester of use. complete the table to show the total cost of using the athletic facilities after each semester listed.
Step-by-step explanation:
1) 43
2) 61
3) 79
4)97
5)115
Answer:
popoverlover20 is correct I got it right
Step-by-step explanation:
Can You Help Me With This Question
Answer:
Step-by-step explanation:
can anyone help me figure this out / explain it to me pls .. ="(
There are 10 questions in a quiz. Using the reference image, find how many questions must be answered correctly to earn at least 14 points.
Answer:
At least 7 questions need to be answered correctly.
What is the slope of a line perpendicular to the line whose equation is 12x-3y=81. Fully reduce your answer.
Answer:
-1/4
Step-by-step explanation:
-3y = 81-12x
y= 4x - 27
4m = -1 x 1/4
= -1/4
Planes A and B are shown. If a new line, p, is drawn parallel to line l, which
statement is true?
O Line p must be drawn in plane B.
O Line p must be perpendicular to line m.
O Line p must be drawn so that it can lie in the same plane as line l.
O Line p must be drawn in the same plane as line n
Answer: the second one
Step-by-step explanation:
I’m smart I have al a’s
The true statement is - Line p must be drawn so that it can lie in the same plane as line l.
What is plane?"It is a two-dimensional flat surface with no edges or thickness."
What are parallel lines?"Two lines in the same plane that are at equal distance from each other and never meet."
For given question,
Planes A and B are shown.
If a new line, p, is drawn parallel to line l, must be drawn so that it can lie in the same plane as line l.
Line l lie in plane A.
So, the line p must be drawn in the plane A.
Therefore, the true statement is - Line p must be drawn so that it can lie in the same plane as line l.
Learn more about parallel lines here:
https://brainly.com/question/16701300
#SPJ3
Claudia spends $2.15 day for lunch.Her cafeteria lunch account has a balance of 48.00.Which equation can be used to determine the maximum number of days,d,that she can eat without adding money to her lunch account?
Given :
Claudia spends $2.15 day for lunch.
Her cafeteria lunch account has a balance of 48.00 .
To Find :
The maximum number of days, d that she can eat without adding money to her lunch account.
Solution :
Number of days she can eat without adding money in her account is :
[tex]n = \dfrac{Remaining \ Balance }{2.15}\\\\n = \dfrac{48}{2.15}\\\\n = 22.325[/tex]
But, number of days cannot be in decimal.
Therefore, maximum number of days she can eat without adding money to her lunch is 22 days.
Andre builds a form for a new cement step in the shape of a rectangular prism. The form he builds is 40 and 1/2 inches long, 10 inches deep, and 8 inches high. How much cement is needed to fill the form?
Answer:
3240 in^3
Step-by-step explanation:
Step one:
given data
The dimension of the form
Length 40 and 1/2 inches long,
Depth 10 inches deep,
The width and 8 inches high
Step two:
The amount of cement is equivalent to the volume of the form
[tex]V=L*W*H\\\\V=40.5*10*8\\\\V=3240 in^3[/tex]
Hence the volume of cement is 3240 in^3
