Mathematics High School

Solve using Elimination

3x+y=-9
y=5x+7

Answers

Answer 1

Answer

x=-2 and y=-3

Step-by-step explanation:

Step: Solvey=5x+7for y:

Step: Substitute5x+7 for y in 3x+y=−9:

3x+y=−9

3x+5x+7=−9

8x+7=−9(Simplify both sides of the equation)

8x+7+−7=−9+−7(Add -7 to both sides)

8x=−16

8x/8=−16/8

(Divide both sides by 8)

x=−2

Step: Substitute−2 for x in y=5x+7:

y=5x+7

y=(5)(−2)+7

y=−3(Simplify both sides of the equation)

Related Questions

y=4x+25 find the domain of the function and if it discrete​

Answers

Answer:

f(x)=xf(x)=x ,  g(x)=2xg(x)=2x

f(x)=5f(x)=5 ,  g(x)=xg(x)=x

Step-by-step explanation:

not sure but still,

the function 56-4y=-5x can be used to determine the total amount of money in a coin jar,y,after money is added for x days. what is the rate of change in dollars with respect to the number of days?

Answers

Answer:

23

Step-by-step explanation:

What is the factored form of 250x3 − 16?

Answers

Answer: 2(5−2)(25^2 + 10 + 4)

Step-by-step explanation:

I took a test with the same question and got it right. Hope this helps

Which set of data contains two outliers?
113, 115, 103, 114, 109, 111, 119
141, 151, 138, 142, 149, 140, 150
99, 113, 91, 104, 109, 114, 97
101, 135, 131, 99, 138, 136, 140

Answers

Answer:

D: 101, 135, 131, 99, 138, 136, 140

Step-by-step explanation:

edg2020 (do not get this confused with the question: "which set contains no outliers"

D

I got it right on the test

Mabel scored 19 points more on her math test than Nancy. Phoebe scored 10 points less on her math test than Nancy. If Phoebe scored 23 points, how many points did mabel score.

Answers

23+10+19=52 so your answer is 52

The point that is scored by Mabel will be 52 points.

Based on the information given, since Phoebe scored 10 points less on her math test than Nancy and scored 23 points, then Nancy will have:

= 10 + 23 = 33 points

Since Mabel scored 19 points more on her math test than Nancy, then, the point that is scored by Mabel will be:

= 33 + 19

= 52 points

Read related link on:

https://brainly.com/question/18730874

HELP THIS IS DUE TONIGHT BY TWELVE I DINT KNOW HOW TO DO THIS!!!

Answers

Answer:it’s (2,5)

Step-by-step explanation:

Solve the linear equation

3.4 + 2(9.7 – 4.8x) = 61.2

Answers

The answer would be -4

Steve draws a line from (-2, -6) to (3, 9). Approximately how long is the line he draws?

Answers

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Let : A = ( - 2 , - 6 ) & B = ( 3 , 9 )

[tex]d = distance \: \: between \: \: points \\ [/tex]

[tex]d = \sqrt{ ( \: {y(B) - y(A) } \: )^{2} + ( \: { x(B) - x(A) } \: )^{2} } \\ [/tex]

[tex]d = \sqrt{ ( \: {9 - ( - 6)} \: )^{2} + ( \: {3 - ( - 2)} \: )^{2} } \\ [/tex]

[tex]d = \sqrt{ ( \: {9 + 6} \: )^{2} + ( \: {3 + 2} \: )^{2} } \\ [/tex]

[tex]d = \sqrt{ {15}^{2} + {5}^{2} } [/tex]

[tex]d = \sqrt{225 + 25} [/tex]

[tex]d = \sqrt{250} [/tex]

[tex]d = \sqrt{25 \times 10} [/tex]

[tex]d = \sqrt{ {5}^{2} \times 10 } [/tex]

[tex]d = 5 \sqrt{10} [/tex]

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Thus Steve draws a line which has a length of 5√10 .

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A block of wood has a volume of 40 cm°, a length of 4 cm, a width of 5 cm. What is the helght of the wood?
49 cm
20 cm
O2 cm
60 cm

Answers

C) 02cm is the correct answer
40\5/4 is 2

8. If b(x) = -2(x-50), what is the value of
b(20)? Request

Answers

-2(20-50)

60 is your answer

PLEASE ANSWER FAST I WILL GIVE BRAINLY A climber is on a hike. After 2 hours he is at an altitude of 300 feet. After 5 hours, he is
at an altitude of 500 feet. What is his average rate of change? Make sure to include
your units!

Answers

Answer:

1.661 feet/ hour

Step-by-step explanation:

To find the rate of change, you take (y2 – y1) / (x2 – x1)

Which equation or inequality represents the following description:
A number times six is greater than five times the number plus one.
A. 6x < 5x + 1
B. 6x = 5x + 1
C. 6x > 5x + 1
D. 6x > 5x + 1

Answers

Answer:

6x > 5x + 1

Step-by-step explanation:

6 times a number is 6x

is greater than is 6x >

than five time the number is 5x

plus one is 5x +1

all together it is 6x > 5x + 1

Answer: just to give person above brainliest.

Step-by-step explanation:

lunches cost 14.75 per week how much would 13 weeks of lunches cost fast pls

Answers

14.75*13= $191.75
—————————-

Answer:

it would cost 191.75

Step-by-step explanation:

i just put it in a proportion like this 14.75/1 = ?/13

then i just multiplied 14.75 and 13 i got the resulting answer 191.75

pls mark brianleist

what is the slope of (-2,-7),(3,-10)

Answers

Answer:

-3/5

Step-by-step explanation:

My work is in the picture I attached

4x^4+35x^2-9=0 solve by factoring

Answers

O si it told me that the solution was -1/2,x2 and it equals =1/2 hope it helps

Find the equation of the linear function represented by the table below in slope-intercept form.

x- 0 1 2 3 4

y- 9 18 27 36 45

Answers

Question: Where is the y2? Please be more specific!

Which one represents a proportional relationship?

Answers

Line D, because starts at the origin which is (0,0) and continues as a strait line. A and C does not start the the origin and line B does not travel in a strait line.
Hope this helps you

The teacher-to-student ratio at a small school was 1:10. After 4 new teachers were added, the teacher-to-student ratio changed to 1:6. How many MORE students than teachers were at the school BEFORE the additions were made?

Answers

Answer:

10 more to every 1 teacher i believe

Step-by-step explanation:

Help ASAP ‍♂️yes or no explanation

Answers

Answer:

yes

Step-by-step explanation:

Yes hg CNN ffjffhjgg CB CNN

write this equation in word form.
x3 + 1

Answers

Answer:

X cubed plus one

Step-by-step explanation:

15.2·0.25−48.51÷14.7/x = ( 13/44 − 2/11 − 5/66 ÷2 1/2 )·1 1/5 / 3.2+0.8·(5 1/2 −3.25)
Plz answer soon. I need it urgently. Need by today. Will give 15 points.

Answers

Answer:

x = 25

Step-by-step explanation:

15.2 * 0.25 - 48.51 ÷ 14.7 = 76/5 * 1/4 - 3.3 = 3.8 - 3.3 = 0.5

(13/44 - 2/11 - 5/66 ÷ 2 1/2) * 1 1/5 = (13/44 - 8/44 - 5/66 * 2/5) * 6/5 =           (15/132 - 4/132) * 6/5 = 11/132 * 6/5 = 1/12 * 6/5 = 1/10

3.2 + 0.8 * (5 1/2 - 3.25) = 3.2 + 4/5 * (22/4 - 13/4) = 3.2 + 9/5 = 3.2 + 2.8 = 5

So after doing all this simplifying and stuff we get 0.5/x = 0.1/5. Using the butterfly method the result is 0.1x = 2.5, multiply both sides by 10 and you get x = 25!! Yayy lol

An amount P at 6% for 5 years compounded monthly increased to $15000.00. What is P? (Round answer to cents)

Answers

Answer:

$20,232.75

Step-by-step explanation:

I hope it helped

Can you help me with my math ixl

Answers

Answer:

b = 72

Step-by-step explanation:

2b - 62 = b-10

Subtract b from both sides!

b -62 = 10

Add 62 to both sides

b = 72

Step-by-step explanation:

since TUVW is a rectangle, VU = WT

b - 10 = 2b - 62

b = 52

Topic: Properties of polygons

If you like to venture further, do check out my insta (learntionary) where I regularly post useful math tips! Thank you!

The polygons to the right are similar. Find the values of each variable! ( simplify ur answer)
Help mee please i have a headache

Answers

Answer:

hi! i'm so sorry about your headache, hope it gets better !

still need help?

Step-by-step explanation:

Marlena solved the equation 2x + 5 = –10 – x. Her steps are shown below.
2x + 5 = –10 – x Use the drop-down menus to justify Marlena’s work in each step of the process.

Answers

Step-by-step explanation:

marlena steps should look like this:

2x + 5 = -10 - x

(minus 5 from both sides)

2x = -15 - x

(add x to both sides)

3x = -15

(divide by 3)

x = -5

Answer:

step 1 addition property of equality

step 2 subtraction property of equality

step 3 division property of equality

Jimmy saw a tent which was $15 more than twice the cost of an air mattress. The total of both was $210. What was the cost of the tent and the air mattress?

Answers

Answer:

  Tent:  $145

  Mattress:  $65

Step-by-step explanation:

      Tent:   2x + 15

Mattress:   x

2x + 15 + x = 210

3x + 15 = 210

3x = 195

x = 65

      Tent:   2x + 15 = 2(65) + 15 = 145

Mattress:   x = 65

Part A - Identify the outlier 3,52,54,64,69,71,77,79,82,88 Part B - Calculate the mean and median with the outlier. Part C - Calculate the mean and median without the outlier. Part D - How did the outlier affect the mean and median? Does the outlier have a greater effect on the mean or the median? Justify your answer with your calculations.

Answers

The outlier is 3, and the outlier has a greater effect on the mean because it is an average of all numbers where as the median is just the middle value in the data set. Everything else you can do on your own. To find the mean you add all the numbers up and divide by the total amount of numbers there are, the median you just cross one out from the left and then cross one out from the right and continue doing this until you are left with one number, or if you are left with two numbers you can add those two numbers up and then divide them by 2

HELP MY BROTHER NEEDS HELP WITH AN ASSIGNMENT BUT I DO NOT KNOW HOW
Order the values from least to greatest. |–4|, 10, –12, |3| A. |–4|, |3|, 10, –12 B. |3|, |–4|, 10, –12 C. –12, |–4|, |3|, 10 D. –12, |3|, |–4|, 10

Answers

The answer is letter C.

Step-by-step explanation:

hope this helps

-12 < -4 < 3 < 10

Answer:

D. –12, |3|, |–4|, 10

Step-by-step explanation:

| - 4|, 10, - 12, |3|

4, 10, - 12, 3

- 12, 3, 4, 10

Find the absolute change and the relative change of the number of refugees in the world that increased from 8.7 million in 2005 to 16.1 million in 2015 on percentage.

Answers

Answer:

Absolute change = 7.4 million

Relative change percentage = 85.1%

Step-by-step explanation:

Given that:

Number of refugees in 2005 = 8.7 million

Number of refugees in 2015 = 16.1 million

The absolute change :

(Number of refugees in 2015 - number of refugees in 2005)

(16.1 million - 8.7 million) = 7.4 million refugees

The relative change in the number of refugees :

((Number of refugees in 2015 - number of refugees in 2005) / number in 2005) * 100%

[(16.1 - 8.7) / 8.7] * 100%

(7.4 / 8.7) * 100%

0.8505747 * 100%

= 85.057%

= 85.1%

does 27 divided by 5 result in 5 and 6

Answers

Answer:

27 divided by 5 = 5.4

Step-by-step explanation:

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