Answers
Answer:
option 3
both (3, 2) and (2, -1) are solutions
Answer:
C
Step-by-step explanation:
-3x + y = -7
use (3, 2) as plug ins for x and y
-3x + y = -7 (rewrite)
-3 x 3 + 2 = -7 (solve)
-3 x 3 = -9
-9 + 2 = -7
same with the other numbers (2, -1)
but i'm lazy
Related Questions
evaluate the expression for x = 3 y= 1/3 and z= 5. 12 x - 3y / 4 x - Z
Answers
Answer:
5
Step-by-step explanation:
12 x - 3y / 4 x - Z
=12×3-3×1/3÷4×3-5
=36-1/12-5
=35/7
=5
So the final answer is 5.
Manny must choose between a pack of four 6.5-ounce containers of yogurt for $3.61 or three 8-ounce containers at $1.27 each. Which is the better buy? Complete the explanation. If necessary, round to the nearest cent.
Answers
Answer: Three-8 ounce containers
Step-by-step explanation: 3 x 1.29 divided by 0.6= $6.45 for three 8-ounce containers
4 x 3.77 divided by 0.6= $15.08
Find the missing measure and write your solution on the blank provided
Answers
Answer:
5: c=65 d=125 e=60
6: c= 58 d= 121 e=63
7. a=55 b=64 c=61
8. a=61 b=55 c=64
Step-by-step explanation: :)
If x is the principal square root of 7, what must be true.
A. x = 7², and x is negative
B. x² = 7, and x is positive
C. x = 7², and x is positive
D. x² = 7, and x is negative
Answers
Answer:
B
Step-by-step explanation:
x=√7
squaring
x²=7
Liam solved the equation 72=8⋅b. His work is shown. What error did Liam make?
Answers
The proportion of observations from a standard Normal distribution that take values larger than -0.75 is about A) 0.2266 B) 0.7704 C) 0.7734 D) 0.7764 E) 0.8023
Answers
Answer:
Option C: 0.7734
Step-by-step explanation:
From z-distribution table attached,
P(Z ≤ -0.75) = 0.2266
However, we are looking for proportion of observations from a standard Normal distribution that take values larger than -0.75.
Thus;
P(Z > -0.75) = P(Z ≤ 0.75) = 1 - 0.2266
P(Z > -0.75) = 0.7734
Option C is the correct answer.
Which numbers should go in the shaded overlap?
Factors of 30
Factors of 20
Answers
A color printer prints 19 pages in 8 minutes.
How many minutes does it take per page?
Answers
Answer:
I believe the answer is two
Step-by-step explanation:
19 divided by eight equasl two
John puts $1,500 in a savings account that earns 7% simple interest annually. Find the new
balance in his savings account after three years if John does not deposit or withdraw any
money.
Answers
Answer:
$1,815
Step-by-step explanation:
Use the simple interest formula, I = prt
Plug in the values we know:
I = prt
I = (1,500)(0.07)(3)
I = 315
Add this to the original amount:
1500 + 315
= 1,815
So, John will have $1,815 in his account after 3 years.
What is the inequality of y-2x<=-3
Answers
In inequalities when you are moving a negative, you flip the sign.
Explain to me in words how you would find the slope of this line and explain answer
Answers
7/3
Explanation:
The slope of the line is equal to the rise/run, or in other words, the number of units the line travels upwards over the number of units the line travels to the right.
We can identify the slope using any two points on the line. Here, we can use the two points that are marked on the picture. The second point is 7 units above the first and 3 units to the right of the first, so the slope of the line is equal to 7/3.
Another way to calculate the slope of the line is the use this formula:
(y2-y1)/(x2-x1)
The first point is at the coordinate (1,-4) and second point is at the coordinate (4,3). When we plug these two coordinates into the equation, we get this:
(y2-y1)/(x2-x1)
->(3-(-4))/(4-1)
When we simply the fraction, we would get 7/3 and that would give us the slope.
I hope this helps!
12(x-6)and 14(x+14).
plz help
Answers
Answer:
138 and 210?
Step-by-step explanation:
What is the value of 15/2+I?
Answers
Answer:
First, make the denominators
15/2+2/2
Then, add
17/2
If you want it in decimal points
8.5
Step-by-step explanation:
I hope I explained well, please give me brainliest
If you want a fraction just remove the point like this
85 and divide by 10
85= 17/2.
10
Hope that helps :D
what is 3 divided by 57.6
Answers
Answer:
0.0520833333 is the answer
Answer:
0.05208333333 (reoccurring)
Step-by-step explanation:
Simple bus stop division (:
41 divide by 278.8 hi my name chavoria
Answers
I believe u might of meant 278.8 divided by 41 which equals 6.8
Determine the sample size required to estimate a population mean to within 10 units given that the population standard deviation is 60. A confidence level of 90% is judged to be appropriate.
Answers
Answer: 98
Step-by-step explanation:
Formula to find sample size if population standard deviation is known:
[tex]n=(\dfrac{z^c\times\sigma}{E})^2[/tex] , where [tex]\sigma=[/tex]population standard deviation, [tex]z^c[/tex] =Critical z-value for confidence level, E= Margin of error.
Given: [tex]\sigma=30,\ \ \ E=10[/tex]
Critical z-value for 90% confidence = 1.645
[tex]n=(\dfrac{1.645\times60}{10})^2\\\\=(1.645\times6)^2\\\\=9.87^2\\\\=97.4169\approx98[/tex]
Required minimum sample size = 98
Sleep habits of New Yorkers. New York is known as the city that never sleeps". A random sample of 25 New Yorkers were asked how much sleep they get per night. Statistical summaries of these data are shown below. The point estimate suggests New Yorkers sleep less than 8 hours a night on average. Is the result statistically signicant? n x s min max25 7.73 0.77 6.17 9.78(a) Write the hypotheses in symbols and in words.(b) Check conditions, then calculate the test statistic, T, and the associated degrees of freedom.(c) Find and interpret the p-value in this context. Drawing a picture may be helpful.(d) What is the conclusion of the hypothesis test?(e) If you were to construct a 90% condence interval that corresponded to this hypothesis test, would you expect 8 hours to be in the interval?
Answers
Step-by-step explanation:
1.
the null hypothesis:
H0: u = 8 hours ( new Yorkers sleep for 8 hours)
The alternate hypothesis;
H1: u ≠ 8 hours ( new Yorkers sleep less than 8 hours)
b.
test statistic
t = (barX - u)/s/√n
= 7.73-8/0.77/√25
= -1.7532
degree of freedom = n-1
= 25-1 = 24
c.
p(value)
= p(t < -1.7532)
= 0.046
obviously we can see that the p value is less than 0.05 alpha level so we reject the null hypothesis.
d
The data gives strong evidence that new Yorkers sleep less than 8 hours on average every night.
e.
at 90% level of confidence
we have
7.73-0.26334, 7.73+0.26334
= 7.466, 7.993
please check attachment
thank you!
-3a - 4(a - 6) = 24 - 7a
Solve the equation
Thanks
Answers
-3a-4(a-6)=24-7a
-3a-4a+24=24-7a
-7a+24=24-7a
-7a+24=-7a+24
-7a+24-24=-7a+24-24
Simplify
Subtract the numbers
Subtract the numbers
−7a=-7a
Add 7a to both sides of the equation
-7a+7a =-7a+7a
Simplify
Combine like terms
Combine like terms
0=0
answer is 0=0
WHOEVER DOES ALL OF THIS GETS BRAINLYEST AND 5 STARS PLS HELP!!!!!!!!!!!!!!
What is the estimated sum of 8/19 + 6/13?
A. 1/2
B. 1
C. 1 1/2
D. 2
Estimate. 20 9/11 divided by 6 19/20
A. 147
B. 120
C. 4
D. 3
Which of the following is the best estimate of 8 1/8?
A. 7 1/2
B. 8
C. 8 1/2
D. 9
Armenia is baking 24 batches of brownies for the bake sale. Each batch of brownies takes 2 4/5 cups of flour. What is a reasonable estimate of the amount of flour that she will need to bake all twenty-four batches of brownies?
A. 96
B. 72
C. 60
D. 48
What is the estimated difference of 4 9/10 - 1 1/12?
A. 4
B. 3 1/2
C. 3
D. 2 1/2
Which of the following is the most reasonable product of 6 15/17 and 8 21/22
A. 63
B. 56
C. 54
D. 48
What is the estimated sum of ?
A. 7
B. 7 1/2
C. 8
D. 9
What is the estimated sum of 6/7 + 4/7
A. 1/2
B. 1
C. 1 1/2
D. 2
Which of the following is the best estimate of 7/8
A. 0
B. 1/2
C. 1
D. 1 1/2
Which of the following is the best estimate of 24 9/20
A. 23 1/2
B. 24
C. 24 1/2
D. 25
Answers
Answer:
1. B
2. D
3. B
4. D
5. C
6. A
7. What is the estimated sum of "?" what are we estimating?
8. C
9. C
10. B
Step-by-step explanation:
1st question
1/4 ≤ 8/19 ≤ 3/4, so round it to 1/2.
1/4 ≤ 6/13 ≤ 3/4, so round it to 1/2.
Estimating:
1/2 + 1/2 = 1
2nd question
220 9/11 divided by 6 19/20 = 2.99542184434
Rounded/estimated = 3
3rd Question
Estimate 8 1/8 (common sense)
8 1/8 = 8.
4th Question
Assuming cups = 2.
2x24 = 48.
5th Question
3
6th Question
Add and estimate
7th question
What is the estimated sum of "?" what are we estimating?
8th question
6/7 > 3/4, so round it to 1.
1/4 ≤ 4/7 ≤ 3/4, so round it to 1/2.
Estimating:
1 + 1/2 = 1 1/2
9th Question
Round 7 to 8. It is over half, so it would be 8, which = 1
10th Question
Half of 20 = 10, 9 isn't above 10.
So round backwards to 24.
Answer:
A)4
72
1
22
3
36
33
3
Step-by-step explanation:
Divide. Express your answer in simplest form. ○14 ○ 49 ○98 ○28
Answers
Answer: 49
see below for work
Answer:
gang gang
Step-by-step explanation:
(39×5) to siplifiy please help
Answers
Answer:
195
Step-by-step explanation:
you just muliply
Answer:
The answer is 175! :)
I recommend searching or creating a times table for yourself, they are incredibly handy! Easy to print off or write down. :))
Step-by-step explanation:
G(x)=(x-2)(3x+3) find the zeros of the function enter the solution from least to greatest
Answers
Hello i need help with that too
Answer: g (x)=(x -2)(3x +3)
lesser x = -1
greater x = 2
Step-by-step explanation:
Please help & thank you.
Answers
Answer:
2). 79°; 3). 65°; 4). 45°; 5) 73°
Step-by-step explanation:
m∠4 = 180° - (70° + 65°) = 45°
m∠3 = 180° - (45° + 70°) = 65°
m∠2 + m∠3 = 180° - 36° = 144°
m∠2 = 144° - 65° = 79°
m∠5 = 118° - m∠4 = 118° - 45° = 73°
Examine circle O, where chords AB¯¯¯¯¯¯¯¯ and CD¯¯¯¯¯¯¯¯ are congruent.
Point P lies on AB and point Q lies on CD.
Angles APO and DQO are right angles.
The diagram as described in the problem.
Which congruence statement is true?
A.) QD≅QO
B.) OP≅AB
C.) CD≅AP
D.) OP≅OQ
Answers
The answer is D.) OP≅OQ
I hope this is the right graph
Please answer i wanna get this over with h ^-2 / h ^4
Answers
Answer:
= h^-6
Step-by-step explanation:
When dividing powers you subtract them (indices rules)
--> -2 - 4 = -6
Hope this helps, please mark as brainliest
A rectangular pool has a length of 200 ft. You're building a model. Using a scale
factor of 1725, what is the scale length of your model? *
Answers
Answer:
1.4 inches.
Step-by-step explanation:
Given that the length of the pool = 200 ft.
Scale factor = 1725.
As,
[tex]\text{Scale factor }=\frac{\text{Original length}}{\text{Scaled length}}[/tex]
So,
[tex]\text{Scaled length} = \frac{\text{Original length}}{\text{Scale factor}}[/tex]
By using the given values, we have
{Scaled length} [tex]= \frac{200}{1725} ft.=0.116 ft.[/tex]
As 1 foot = 12 inch,
So, scaled length = 0.116 x 12 = 1.4 inches.
Hence, the scale length of the model = 1.4 inches.
Solve the following expression: (9 x 10) - (30 + 30). Show all steps taken.
Answers
Answer:
First multiply each brackets
90-60
30
Step-by-step explanation:
Answer:
9 x 3= 27 and 30 + 30= 60.. so 60- 27= 33, but if you want to do 27- 30.. it would be -33.
Step-by-step explanation:
Hope that answers your question!
X - 2
x2-2x + 3
4.
x + 3
x + 3
Answers
Answer:
The equation is likely (x2 -2x -3)/(x+2) and to simplify you can do polynomial synthetic division or long division. Using long division because it works in all cases:
________
x+2√x2 -2x -3 how many times does x go into x2 , x times
x - 4 ______
x+2√x2 - 2x -3 multiply x by x + 2 and create the next row
-(x2 )
-4x - 3 bring down the -3 and repeat first step. how many times does x go into -4x, -4 times
-(-4x - 8) multiply x + 2 by -4
5 (this is the remainder but it must be in the form 5/(x+2)
so the answer is x - 4 + 5/(x + 2). Hopefully, this is what your teacher considers "simplified".
Step-by-step explanation:
Copied this from wyzant.com.
I WILL GIVE BRAINLIEST ONLY IF YOU ANSWER WELL
Which expression uses the commutative property to make it easier to evaluate 3/5·1/4·25
A.25·4·3/5
B.5/3·25·1/4
C.3\5·25·1\4
D.3/5·1/25·1/4
Answers
Answer:
I dont know im in middle school can you please giva me one i have to get my grades up
Step-by-step explanation:
Answer:
A.
Step-by-step explanation:
3
5
(1)
4
(25)
=
3
5
4
(25)
=
3
20
(25)
=
15
4
Guided Practice
CPCTC
Given
KGK
H is the midpoint of GK
Prove:
Side FG - Side JK
Statement
Reason
es