Answer:
it's so hard bro I can't anser
Pls helppp :))
Solve for x by factoring
X^2+4x-21=0
There are multiple answers
Answer:
[tex]x=3,-7[/tex]
Step-by-step explanation:
We can solve for x by using [tex]\frac{-b\pm\sqrt{b^{2} -4ac} }{2a}[/tex]
By applying this on the quadratic equation, we get:
[tex]x=\frac{-4\pm\sqrt{4^{2}+84} }{2}[/tex]
Which simplifies to:
[tex]x=\frac{-4\pm10}{2}[/tex]
[tex]\therefore x=3,-7[/tex]
Using the order of operations, what should be done first to evaluate (-4) +6-(-3-4) (2) - 5?
VX
© Subtract 5 from 2.
Divide 6 by-3.
0 Add-3 and 4
O Multiply 4 and 2
Answer:
The answer is Add -3 and 4 should be done first
Which number line shows point A plotted at -7?
Answer:
The third number line.
Hope this helps and have a great day!
And please mark me brainliest if you can :)
Please help brainliest giveaway
Answer:
Hey, just here so he can get brainliest, have a nice day!
Step-by-step explanation:
Answer:
o
Step-by-step explanation:
Round 53.121 to the nearest half.
The diagram above represents a biochemical process that occurs in a cell. The purpose of this process is to synthesize ?
Messenger RNA
Carbohydrates
Deoxyribonucleic Acids
Proteins
Answer:
Proteins
Step-by-step explanation:
I took the test and I got it right.
Answer:
proteins
Step-by-step explanation:
1. If 8 lbs. of onions costs $19.20, then how much will 11 lbs. of onions cost? 2. If my car travels 270 miles on 15 gallons of gas, then how many gallons of gas will be needed to travel 414 miles? 3. f 12 gallons of oil cost $34.80, how much will 7 gallons cost? 4. If a snail moves 9 inches in 5 minutes, how long will it take to move 27 inches? 5. You get paid 51.00 for 4 hours of work. How much would you get paid for 9 hours of work? PLEASE EXPLAIN HOW YOU GOT THE ANSWER. I MIGHT MARK BRAINLIEST IF RIGHT!
Answer:
1. 26.4
2. 23
3. 20.3
4. 15
5. 114.75
Step-by-step explanation:
1. 19.20/8= 2.4
2.4 *11= 26.4
2. 270/15=18
414/18=23
3. 34.80/12= 2.9
2.9*7=20.3
4. 9/5=1.8
27/1.8=15
5. 51.00/4= 12.75
12.75*9=114.75
The value of x square +y square when x =-3and y =4 is
DO Y'ALL KNOW THE ANSWER?
Answer:
C
Step-by-step explanation:
12000 feet equals about 2 miles.
5280 is about half of 12000 so it is about 1 mile.
5. You are buying orange juice for $3.50 per container and have a gift card worth $5. The function f(x) = 3.50x-5 represents your total cost f(x) if you buy x containers of orange juice and use the gift card. How much would you pay for 4 containers of orange juice?
Answer:
$9
Step-by-step explanation:
If you do 3.5*4 then you get 14. You then use the $5 gift card so you subtract 5 from 14 and get 9
using the equation, that would be f(x) = (3.5*4)-5. Using PEMDAS, you would do the parenthesis first so it would be f(x) = 14-5 which equals 9
I need to rearrange the variables to solve for pressure, P, as a function of volume and temperature, V and T. Write out your work on paper and submit a picture.
Answer:
P = (8T) / V
Step-by-step explanation:
P*V=8*T*P/P multiply both sides by P
P*V=8*T because P/P=1
P = 8T/V divide both sides by V
Question... The leader of a city crime watch team sends out a survey to her neighbors asking them to vote on the best time to patrol the city to watch for criminal acts. Describe how the design of the survey leads to bias. (4 points)
Options...
A nonresponse error was made in this design. This type of sampling only represents the city and not the entire county population.
A nonresponse error was made in this design. This type of sampling only represents the neighborhood with the worst crime and not the entire city population.
A convenience sample error was made in this design. This type of sampling only represents the neighborhood with the least crime and not the entire city population.
A convenience sample error was made in this design. This type of sampling is only representative of one neighborhood and not the entire city population.
There are no potential areas of bias.
Answer:
(c) A convenience sample error was made in this design. This type of sampling is only representative of one neighborhood and not the entire city population.
You purchased concentrated cleaner that must be diluted before use. Container a is the cleaner, which is 20% solution. Container b is pure water. You are mixing together the contents of container a and container b to produce 40 gallons of 9% solution. How many gallons from each container are needed to create the 40 gallons of 9% cleaning solution?
Answer:
18 gallons from container [tex]a[/tex] and 22 gallons from the container [tex]b[/tex] to be mixed to get the required mixture.
Step-by-step explanation:
Given that the container [tex]a[/tex] has 20% concentrated cleaner
and container [tex]b[/tex] has pure water which has 0% cleaner.
Let x gallons from container a and y gallons from the container b are mixed to get a 9% concentrated solution.
So,
[tex]9\%\; \text{of}\; (x+y) = (20\% \; \text{of}\; x )+(0\% \; \text{of}\; y)\cdots(i)[/tex]
As the total amount of the final solution= 40 gallons
So, [tex]x+y=40\cdots(ii)[/tex]
Using the value of equation (ii) in equation (i), we have
9% of 40 = 20% of x
[tex]\Rightarrow 0.09\times 40=0.2 \times x[/tex]
[tex]\Rightarrow x=\frac{0.09\times 40}{0.2}[/tex]
[tex]\Rightarrow x=18[/tex] gallons.
From equation (ii),
18+y=40
[tex]\Rightarrow y=40-18=22[/tex] gallons.
Hence, 18 gallons from container [tex]a[/tex] and 22 gallons from the container [tex]b[/tex] to be mixed to get the required mixture.
Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wooden docks and piers, they are now being studied to determine whether the enzyme they secrete will allow us to turn inedible wood and plant waste into biofuel.1 A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72. Give a best estimate for the length of gribbles, a margin of error for this estimate (with 99% confidence), and a 99% confidence interval. Round your answer for the point estimate to one decimal place, and your answers for the margin of error and the confidence interval to two decimal places. point estimate = Enter your answer; point estimate margin of error = Enter your answer; margin of error The 99% confidence interval is Enter your answer; The 99%confidence interval, value 1 to Enter your answer; The 99%confidence interval, value 2
Answer:
a) The Margin of Error = 0.26
b) The 99% Confidence Interval = ( 2.84, 3.36)
Step-by-step explanation:
a) Margin of Error
The formula for Margin of Error =
z × Standard deviation/√n
From the above question
The z score for 99% confidence interval = 2.576
Standard deviation = 0.72
n = Random number of samples = 50
Margin of Error =
2.576 × 0.72/√50
= 1.85472 /√(50)
= 0.2622970178
Approximately to 2 decimal places = 0.26
b) 99% Confidence Interval
= Mean ± Margin of Error
Mean = 3.1mm
Confidence Interval = 3.1 ± 0.26
3.1 ± 0.26
= 2.84
3.1 + 0.26
= 3.36
The 99% Confidence Interval = ( 2.84, 3.36)
Ina certain county weights of women are normally distributed with a mean of 138 lb and a standard deviation of 15 lb. What percentage of women in that country weigh more than 120 lb
Answer:
88.493%
Step-by-step explanation:
We solve this question using z score formula.
Z score = x - μ/σ
where
x is the raw score = 120lb
μ is the population mean = 138lb
σ is the population standard deviation = 15lb
Hence,
z = 120 - 138/15
= -1.2
Probability value from Z-Table:
P(x<120) = 0.11507
P(x>120) = 1 - P(x<120)
1 - 0.11507
= 0.88493
Converting to percentage
= 0.88493 × 100
= 88.493%
The percentage of women in that country weigh more than 120 lb is 88.493%
Evaluate the following expression. 1 + tan^2(pi/6)
A. 2
B. 4
C. 11/3
An explanation of the answer will be awarded extra points
Answer:
B
Step-by-step explanation:
I Can't explain it,I'm sorry
How many times do you have to move the decimals before dividing 8.65 ÷ 0.003?
Answer:
5 times twice in 8.65 and three times in.003
Step-by-step explanation:
Colton scored a 70 on his first history test of the term and a 91 on the second history test. Coltons score increased by what percent?
Answer:
30 Percent
Step-by-step explanation:
Use the percent change formula.
can you help i need to finish this by today!
Terri is starting a babysitting service to make some extra money. She plans to charge a base fee of $10 plus $7 per hour. Write a function that could be used to represent her total charge for the babysitting service, y, as a function of the number of hours she babysits, x. *
y = 10x – 7
y = 7x – 10
y = 10x + 7
y = 7x + 10
Work Shown:
x = number of hours she babysits
1 hour = 7 dollars
x hours = 7x dollars (multiply both sides by x)
She earns 7x dollars after babysitting x hours if we ignore the $10 base fee. Add on the $10 base fee to get 7x+10 dollars total.
Therefore y = 7x+10 is the equation we want.
Answer:
I thought it would be y=10x+7 because the base fee which is the starting fee is 10 and your adding 7 every hour so that would be +7.
Step-by-step explanation:
What is the answer to this equation
1) 4(x + 5) = 40
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
[tex]4(x + 5) = 40[/tex]
Divide sides by 4
[tex] \frac{4}{4} \times (x + 5) = \frac{40}{4} \\ [/tex]
[tex]x + 5 = 10[/tex]
Subtract sides 5
[tex]x + 5 - 5 = 10 - 5[/tex]
[tex]x = 5[/tex]
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
CHECK :
[tex]4(5 + 5) = 40[/tex]
[tex]4 \times 10 = 40[/tex]
[tex]40 = 40[/tex]
Thus the solution is correct.
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
Done...
What is the value of y in the equation 9 + y = 8? this is extremely time sensitive
You have to switch the 8 to the left and the y to the right which would change the equation to 9-8=y
y=1
Answer: y =-1
Step-by-step explanation:y =-1
Last option is correct.
Step-by-step explanation:
The given equation is
In order to solve for y, we need to isolate y.
In this equation 9 is added with y and hence in order to eliminate 9 from the left hand side, we do reverse operation of addition.
The reverse operation of addition is subtraction. Hence, we subtract 9 to both sides of the equation
PLEASEEEER HELPPP!!
If possible how would you prove that the given triangles congruent
Answer:
AAS
Step-by-step explanation:
Quinton typically walks 28 yards south on Pine Street and 45 yards east on Maple Avenue in order to get to school. How much shorter would his walk be if he took the shortcut shown below? (50PTS)
Answer:
B- 20 yards
Step-by-step explanation:
First you have to find the hypotenuse by finding the square root of 28 squares plus 45 squared which equals 53 yards. Next you have to add the two legs of the right triangle so we can subtract the shortcut length from that. So you have to do 28 plus 45 which equals 73 yards. 73 minus 53 is 20. So the answer is 20 yards.
Answer:
20
you have to find the hypotenuse by finding the square root of 28 squares plus 45 squared which equals 53 yards. you have to add the two legs of the right triangle so we can subtract the shortcut length from that. So you have to do 28 plus 45 which equals 73 yards. 73 minus 53 is 20. So the answer is 20 yards.
if you have a question on anything just ask
Answer:
how are you
Step-by-step explanation:
please i need this quick , it’s so confusing
Jimmy has 10 apple’s and gets rid of 2 how many are left
Answer:
8
Step-by-step explanation:
Answer:
8 apples
Step-by-step explanation:
By saying gets rid of, it means subtraction
So, the equation would be
10-2
=8
Hope that clarified your answer!
uh i got put into algebra 1 pls help
Urgent!!!!! Please answer!!!!!!
Answer:
A
Step-by-step explanation:
A 6 pack of Snickers bars costs $5.70.
How much would a 10 pack cost at the same price per bar?
Answer:$9.5
Step-by-step explanation:
