1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Free_Kalibri [48]
3 years ago
10

I need help solving systems of equations by substitution

Mathematics
1 answer:
Semenov [28]3 years ago
5 0
-7x-2y=-13
x= 2y+11 make x or why the subject and substitute it into the first equation.
-7(2y+11)-2y=-13
-14y-77-2y=-13
-16y=64
y=-4
x=-2×-4+11
x=3
You might be interested in
10. The Johnson family purchased a new television that had a 62 inch diagonal. The height of the television was 30 inches. Appro
lana66690 [7]

Answer:

Width = 54.3 inches

Step-by-step explanation:

We solve this question using the Pythagoras Theorem

Width² + Height² = Diagonal²

From the above question

Width= ??

Height = 30 inches

Diagonal = 62 inches

Width² + 30² = 62²

Width² = 62² - 30²

Width = √62² - 30²

Width =✓2944

Width = 54.258639865 inches

Approximately

Width = 54.3 inches

Hence, the new television was 54.3 inches wide.

7 0
3 years ago
Help.. ill give brainliest..
saveliy_v [14]

Answer:

Hi there

1. 28

2. -18

3. -26

4. 14

5. -7

6. 2

7. -17

8. 12

9. -12

10. -15

11. 24

12. 8

13. 2

14. 4

15. - 23

16. - 9

Step-by-step explanation:

there is a easy step to integers

1. if there is a plus then minus or vice versa way then u should subtract .

( + - = - )

2. if there are two plus signs then, add .

( + + = + )

3. if there are two minus signs then , subtract

( - - = - )

hope u understand

5 0
3 years ago
Help! Solve for the value of x.
Ludmilka [50]

Answer:

x=6 degrees

Step-by-step explanation:

I know that 31+(10x-1)=90. Then I have to subtract 31 from 90 to get 10x -1.

That's 59. I solve for x in the equation 59=10x-1.

That is the same thing as 60=10x, which is also the same as 6=x.

4 0
3 years ago
You must reverse the inequality sign when solving this inequality: x + 7 < 4
SSSSS [86.1K]

I'm not 100% sure what you want me to do with this but i hope this helps:


x < -3

or if you want me to flip the sign then the solution becomes

x > -3

7 0
3 years ago
Oblicz.Pamiętaj o kolejności wykonywania działań
SashulF [63]

Answer:

33.275

Step-by-step explanation:

<u>1 step:</u> Difference in brackets

3.5-2\dfrac{1}{3}=3\dfrac{1}{2}-2\dfrac{1}{3}=(3-2)+\left(\dfrac{1}{2}-\dfrac{1}{3}\right)=1+\dfrac{3-2}{3\cdot 2}=1+\dfrac{1}{6}=1\dfrac{1}{6}

<u>2 step:</u> 0.75\div\dfrac{1}{3}

0.75\div\dfrac{1}{3}=\dfrac{75}{100}\div \dfrac{1}{3}=\dfrac{3}{4}\times \dfrac{3}{1}=\dfrac{9}{4}

<u>3 step:</u> 1.28\div 0.04

1.28\div 0.04=128\div 4=32 \ \text{Move point two decimal places}

<u>4 step:</u>

2\dfrac{1}{4}\times 1\dfrac{1}{6}=\dfrac{2\cdot 4+1}{4}\times \dfrac{1\cdot 6+1}{6}=\dfrac{9}{4}\times \dfrac{7}{6}=\dfrac{63}{24}=\dfrac{21}{8}

<u>5 step:</u>

\dfrac{9}{4}+32-\dfrac{21}{8}+1.65=(32+1.65)+\left(\dfrac{9}{4}-\dfrac{21}{8}\right)=33.65+\dfrac{9\cdot 2-21}{8}=33.65-\dfrac{3}{8}=33.65-0.375=33.275

6 0
3 years ago
Other questions:
  • What is the volume of a sphere with a radius of 18 units?
    5·1 answer
  • Given that (2,4) is on the graph of f(x), find the corresponding point for the function f(x)-5
    14·1 answer
  • Probability &amp; Statistics: The Quarantine Puzzle D You are stuck at home watching people walk down the street. Assuming half
    10·2 answers
  • At Maki's Swimwear, there are 24 bikini styles and 36 other types of swimsuits.
    15·1 answer
  • Round 2895 to the nearest 10
    9·2 answers
  • An apple pie is divided into eight equal slices with each slice being 280 calories. How much calories are in the entire pie
    8·1 answer
  • FREE BRAINLEST.
    15·2 answers
  • File attached<br> Will give brainliest
    15·2 answers
  • A rectangular football field measures 505050 meters by 252525 meters. The football team has to run around the field 444 times du
    13·1 answer
  • On the first day of school bethanys family's donated 60$
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!