(05.05 LC)
If you were to use the substitution method to solve the following system, choose the new
equation after the expression equivalent to x from the second equation is substituted into
the first equation. (5 points)
3x + 2y = -21
x-3y=4
3(3y + 4) + 2y = -21
O 31-3y + 4) + 2y = -21
3x + 2(3y + 4) = -21
3x + 21-3y + 4) = -21

Answers

Answer 1

Yes it is yep correct 1000% 10000000000000%


Related Questions

What is the slope of Y= x +5

Answers

The slope is 1 it passes through the y axis one time

Explanation: m is the slope and b is the y intercept.

Answer: Therefore, for the equation y = x+5 the slope is 1, and the y intercept is 5.

Nolan says the rate of change shown on the graph is 2/3

Nadia says the rate of change shown on the graph is 8/3

A. Nolan
B. Nadia

Why did you put that answer?

Answers

Answer:

Nadia is correct

Step-by-step explanation:

Rate of change = y/x

Using a point on the graph, say, (3, 8),

Rate of change = 8/3.

Therefore, Nadia's answer is correct while that of Nolan is wrong.

If p varies inversely as Q2 and p = 4 when Q =0.5, find p when Q = 1.5

Answers

Answer:

a) k = 8

b) p = 12

Step-by-step explanation:

Step(i):-

Given that p varies inversely as Q

                           p∝ Q

                           p = k Q

Given that p = 4 and Q = 0.5

                        4 = k (0.5)

                       k = [tex]\frac{4}{0.5} = 8[/tex]

Step(ii):-

 Given that Q = 1.5

                  p = k Q

                 p = 8 (1.5)

                p = 12

       

You can buy a box of 150 sharpies for $165 or a dozen for $13.50? Which of the two prices is a better deal and explain why

Answers

Answer:

do the a dozen for $13.50

Step-by-step explanation:

It will help save money

Answer:

The dozen for $13.50 is a way better deal

Three co-workers recorded the amount of water in a fish tank being replaced at regular intervals.


maggie measured 1/2 gallon of water in 2/3 of an hour.

christine measured 3/4 gallon of water in 6/5 of an hour.

gianna measured 2/3 gallons of water in 4/5 of an hour.


What two statements are true?

A. Giannas fish tank replaced the most water per hour.

B. Christies fish tank replaced the most water per hour.

C. Christies fish tank replaced the least water per hour.

D. All three fish tank replaced more than one gallon of water per hour.

E. Two of the fish tanks almost replaced the same amount of water per hour.

Answers

Answer:

A. Giannas fish tank replaced the most water per hour.

C. Christies fish tank replaced the least water per hour.

Step-by-step explanation:

Let define the replacement rate ([tex]r[/tex]), measured in gallons per hour, by the ratio of capacity ([tex]c[/tex]), measured in gallons, to replacing time ([tex]t[/tex]), measured in hours. That is:

[tex]r = \frac{c}{t}[/tex] (1)

The co-worker with the highest rate replaces the most water in a hour. Let see the rate of each co-worker:

Maggie ([tex]c = \frac{1}{2}\,gal[/tex], [tex]t = \frac{2}{3}\,h[/tex])

[tex]r = \frac{\frac{1}{2}\,gal }{\frac{2}{3}\,h }[/tex]

[tex]r = \frac{3}{4}\,\frac{gal}{h}[/tex]

[tex]r = 0.75\,\frac{gal}{h}[/tex]

Christine ([tex]c = \frac{3}{4}\,gal[/tex], [tex]t = \frac{6}{5}\,h[/tex])

[tex]r = \frac{\frac{3}{4}\,gal }{\frac{6}{5}\,h }[/tex]

[tex]r = \frac{15}{24}\,\frac{gal}{h}[/tex]

[tex]r = \frac{5}{8}\,\frac{gal}{h}[/tex]

[tex]r = 0.625\,\frac{gal}{h}[/tex]

Gianna ([tex]c = \frac{2}{3}\,gal[/tex], [tex]t = \frac{4}{5}\,h[/tex])

[tex]r = \frac{\frac{2}{3}\,gal }{\frac{4}{5}\,h }[/tex]

[tex]r = \frac{10}{12}\,\frac{gal}{h}[/tex]

[tex]r = \frac{5}{6}\,\frac{gal}{h}[/tex]

[tex]r = 0.833\,\frac{gal}{h}[/tex]

From these informations, we conclude that Gianna's fish tank replaced the most water per hour and Christine replaced the least water per hour. All three fish tanks replace less than one gallon of water per hour. Therefore, correct answers are A and C.

True or false, A triangle with side lengths of 9 cm, 19 cm, and 17 cm is a right triangle.

Answers

Answer:

False

Step-by-step explanation:

A right triangle has all side lengths the same

Answer: give me brainliest now

Step-by-step explanation:

I NEED SOME HELP TO GET MY GRADE UP PLZ!

Answers

Answer:

Step-by-step explanation:

I think the answer is none of the above

Help I will give Brainily to the one that give me the explanation and answer

Answers

Answer:

Step-by-step explanation:

It is a vertical parabola. The equation of a vertical parabola can be written in the form y = a(x-h)² + k, where a>0 and (h,k) is the vertex.

You can eliminate G and I because the leading coefficient is negative.

The graph isn't marked with units, but both F and H say that the vertex is at (0,-2), so you know that each square on the graph is one unit.

Now look for another clue.

The x-intercepts are at (-1,0) and (1,0). Plug one of the points into F and H.

F: 0 = 2·1² - 2

H: 0 ≠ 1² - 2

So, F represents the graph.

Carlos got 130 pieces of candy on Halloween and 39 of them were lollipops what percent of the pieces of candy were lollipops

Answers

Answer: 30%
The answer is 30 percent.

12. Which of the following numbers is contained in the solution set of the inequality
|-5x + 351 > 20?

Answers

Answer:

x<331/5

Step-by-step explanation:

Step 1: Subtract 351 from both sides.

−5x+351−351>20−351

−5x>−331

Step 2: Divide both sides by -5.

−5x

−5

>

−331

−5

You move left 4 units and right 3 units. You end at (-2, -1). Where did you start?

Answers

Answer:

-2 y

Step-by-step explanation:

Which transformation maps the large triangle onto the
small triangle?

Answers

Answer:

Dilation transformation

Step-by-step explanation:

Dilation transformation maps the large triangle onto the small triangle.

4^3/2-2^3*6+8(-1)^10

Answers

Answer:

-24

Step-by-step explanation:

What is the value of sin(48) ? Use a calculator and round to the nearest tenth

Answers

Answer:

0.743

:))))))))))))))

como puedo simplificar 1 + y + (-5) ?

Answers

Answer:

1 + y + ( - 5 ) =  y - 4         eso es mi respuesta

Step-by-step explanation:


Lilly sells 4 boxes of cookies
in 60 minutes. At this rate
how long will it take Lilly to
sell 10 boxes of cookies?

Answers

150 minutes ! 60/4 multiplied by 10!

the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 are called

Answers

Answer:

numbers thank you whole numbers

Step-by-step explanation:

A local arts council has 200 members. The council president wanted to estimate the percent of its members who have had experience in writing grants. The president randomly selected 30 members and surveyed the selected members on their grant-writing experience. Of the 30 selected members, 12 indicated that they did have the experience. Have the conditions for inference with a one-sample z -interval been met

Answers

Answer:

Yes the sample can be use to make inference

Step-by-step explanation:

The inference is possible if the conditions:

p*n > 10      and   q*n > 10

where p and q are the proportion probability of success and q = 1 - p

n is sample size

Then   p = 12 / 30  = 0,4         q =  1 - 0,4    q  =  0,6

And  p*n  =  0,4 * 30  = 12            12 > 10

And  q*n  = 0,6 * 30   = 18            18 > 10

Therefore with that sample the conditions to approximate the binomial distribution to a Normal distribution are met

To check the condition for inference with a one sample z-interval, we have to divide randomly selected member by total number of arts council.

No, the sample size is not less than 10% of the population size,

Given:

The total number of council member are 200.

The randomly selected members are 30 .

Calculate the ratio of randomly selected members and total number of council member.

[tex]\dfrac{n}{N}=\dfrac{30}{200}\\\dfrac{n}{N}=0.15\\\dfrac{n}{N}=0.15>0.10[/tex]

Thus, No, the sample size is not less than 10% of the population size.

Learn more about z-interval here:

https://brainly.com/question/7204089

Which expressions are equal to..

Answers

12³...........is correct one.....☑️✔️☑️

Magda works at a charity for homeless people.
She needs to make lunch for 15 people.
Magda knows this rule to find the amount of rice she needs to cook.

Magda thinks she needs to cook 10 cups of rice for 15 people.

Is Magda correct?

Answers

Answer:

yes

Step-by-step explanation:

if their is no explaining the best choice would be yes

Brooklin has been practicing her typing, her original speed is 63 words in 3 minutes. Find her unit rate in words per minute?

Answers

Answer:

21 words per minute

Step-by-step explanation:

Find her unit rate by dividing the number of words by the number of minutes:

63/3

= 21

So, her unit rate is 21 words per minute

Answer:

21 words per minutes

Step-by-step explanation:

The first answer should be correct, unless there is something I'm not understanding.

Need help ASAP
Will mark you brainlist

Answers

Answer:

Step-by-step explanation:

Brayden's car travels 37.1 miles per gallon.

Dylan's car travels 48.4 miles/(2 gallons) = 24.2 miles per gallon.

37.1 - 24.2 = 12.9

Dylan's car gets 12.9 miles per gallon less than Brayden's car.

2. The route used by a certain motorist in commuting to work contains two intersections with traffic signals. The probability that he must stop at the first signal is 0.36, the analogous probability for the second signal is 0.54, and the probability that he must stop at at least one of the two signals is 0.65. What is the probability that he must stop at exactly one signal?

Answers

Answer:

0.30

Step-by-step explanation:

Probability of stopping at first signal = 0.36 ;

P(stop 1) = P(x) = 0.36

Probability of stopping at second signal = 0.54;

P(stop 2) = P(y) = 0.54

Probability of stopping at atleast one of the two signals:

P(x U y) = 0.6

Stopping at both signals :

P(xny) = p(x) + p(y) - p(xUy)

P(xny) = 0.36 + 0.54 - 0.6

P(xny) = 0.3

Stopping at x but not y

P(x n y') = P(x) - P(xny) = 0.36 - 0.3 = 0.06

Stopping at y but not x

P(y n x') = P(y) - P(xny) = 0.54 - 0.3 = 0.24

Probability of stopping at exactly 1 signal :

P(x n y') or P(y n x') = 0.06 + 0.24 = 0.30

Solve the equation for x. Express the solution as a logarithm in base-e.

Answers

Divide both sides by 4
e^(2.7x) = 8.25

Take natural logarithm of both sides
2.7x = ln 8.25

x = (ln 8.25)/2.7 = ln (8.25^(1/2.7))

Someone help with question 5 please!

Answers

Answer:

c

Step-by-step explanation:

a lot of points for who gets this right!
mary drew a graph which showed how much money she made throughout a garage sale where on the graph would you find the initial amount that was in the box

Answers

Answer:

on the end of the graph (5,10)

Step-by-step explanation:

hope that

calculate the unit rate of change for each linear function using the formula. (4,9) (8,12) (16,18) (32,30)

Answers

Answer:

The unit rate of change is of [tex]\frac{3}{4}[/tex]

Step-by-step explanation:

We are given a set of points (x,y).

To find the unit rate of change, we take two points, and divide the change in y by the change in x.

Points (4,9) and (8,12)

Change in y: 12 - 9 = 3

Change in x: 8 - 4 = 4

Unit rate of change: [tex]\frac{3}{4}[/tex]

Which gives 28 + 24 as a product of the GCF and a sum?

a. 2 (14 + 12)

b. 4 (7 + 6)

c. 2 (26 + 22)

d. 40 + 12

Answers

Answer:

b. 4 (7 + 6)

Step-by-step explanation:

Finding the GCF between 28 and 24:

We keep dividing while both numbers can be divided by the same factor. So

28 - 24|2

14 - 12|2

7 - 6

There is no number for which 7 and 6 are both divisible by, so the GCF between 28 and 24 is 4.

Simplifying in function of the GCF:

Now, we put 4 in evidence, and divide the rest of the expression by 4. So

[tex]28 + 24 = 4(\frac{28}{4} + \frac{24}{4}) = 4(7 + 6)[/tex]

The answer is given by option b.

Mary is cutting strips of paper for a craft project. Each strip is 1/6 of a sheet of paper. Mary has 2/3 of a sheet of paper left to cut. She wants to determine how many more strips of paper she can cut from what is left.


Mary can cut ___ more strips than paper

Answers

Answer:

4 more strips

Step-by-step explanation:

Given that:

Length per strip = 1/6

Fraction of paper left = 2/3

Number of strips that can be cut from the Fraction left ;

Fraction left ÷ length per strip

2/3 ÷ 1/6

2/3 * 6/ 1

(2 * 6) / (3 * 1)

12 / 3

= 4

Karen's aunt is buying peaches to make peach cobbler. She needs 6 peaches for each cobbler.

Write an expression to describe the total number of peaches used given the number of cobblers made, c. Use the expression to determine how many peaches were used if Karen's aunt makes 12 cobblers.

A.
6
c
; 72 peaches

B.
6
+
c
; 18 peaches

C.
6
c
;
1
2
peach

D.
c
6
; 2 peaches

Answers

Answer:

A. 72

Step-by-step explanation:

If she is making 12 cobblers and needs 6 peaches per one.

She needs 72 (6 times 12= 72) or ( 6c = 72)

Answer:

A

Step-by-step explanation:

All you do in this one is multiply 6 by c, which is 12 in this case.

6c = ?       c = 12      6*12 = 72

The answer is 72 peaches. A.

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