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
alukav5142 [94]
2 years ago
7

HELP DO THESE 4 for 100 points and BRAINLIEST asap pls show all your work!

Mathematics
2 answers:
mina [271]2 years ago
7 0

Answer:

  • 10) (- 7, - 1)  11) (-3, - 1)  14) (9, 5)  15) (1, - 2)

Step-by-step explanation:

<h3>#10</h3>
  • x = - 7
  • 3x - 5y = - 16 ⇒ 3(- 7) - 5y = - 16 ⇒ - 21 - 5y = - 16 ⇒ 5y = - 5 ⇒ y = - 1
<h3>#11</h3>
  • - 8x + y = 23  (x4) ⇒ - 32x + 4y = 92
  • - x - 4y = 7

<u>Add up:</u>

  • - 32x - x = 92 + 7 ⇒ - 33x = 99 ⇒ x = - 3

<u>Find y:</u>

  • - (- 3) - 4y = 7 ⇒ 3 - 4y = 7 ⇒ 4y = - 4 ⇒ y = - 1
<h3>#14</h3>
  • x = 9
  • y = 1/3x + 2 ⇒ y = 1/3(9) + 2 ⇒ y = 3 + 2 ⇒ y =  5
<h3>#15</h3>
  • - 2x - 3y = 4  (x 2)  ⇒ - 4x - 6y = 8
  • - 7x + 2y = - 11  (x 3) ⇒ - 21x + 6y = - 33

<u>Add up:</u>

  • - 4x - 21x = 8 - 33 ⇒ - 25x = - 25 ⇒ x = 1

<u>Find y:</u>

  • (-2)(1) - 3y = 4 ⇒ - 2 - 3y = 4 ⇒ - 3y = 4 + 2 ⇒ - 3y = 6 ⇒ y = - 2

Mnenie [13.5K]2 years ago
6 0

(10)x= -7_______(i)

3x-5y= -16____(ii)

put value of x in (ii) then we have:-

3x-5y= -16

3(-7)-5y= -16

-21-5y= -16

-5y = -16+21

-5y = 5

y = 5/-5= -1

y= -1

(11)

You might be interested in
Order the following decimals from greatest to least (separated by
Feliz [49]

Answer:

0.14, 0.5, 0.71, 0.8, 0.83

7 0
3 years ago
Question<br> Solve the system of linear equations by substitution.<br><br> y=2x+5<br> y=3x−1
Degger [83]

2x + 5 = 3x - 1

x = 6

y = 17

please give brainliest

4 0
2 years ago
cassie is training for a marathon. she has been recording her miles in a journal leading up to race day. the following table sho
Umnica [9.8K]

Answer: There are a lot of possibilities

- she was taking a break

- she forgot

- she was too busy

- she was injured

- she didn't want to

- there was an emergency

I guess you could pick your favorite...

8 0
3 years ago
The average turtle can walk 3 mph. How far can the turtle walk in 3 minutes?​
nordsb [41]

Answer:

Step-by-step explanation:

if it can walk 3 mph per hour, then it can walk 9 mph in 3 hours

6 0
3 years ago
Read 2 more answers
The measure of an angle is equal to the meausure of its complement. find the degree measure of the angle
Nookie1986 [14]
Sine they are equal and a complement means add up to 90, they are 45.
45+45 =90
6 0
3 years ago
Other questions:
  • PLEASSEE HELPP!!
    15·2 answers
  • A large cheese pizza costs $18. Each topping you add on cost $1.50 How much would it cost to get a large cheese pizza with c top
    10·2 answers
  • Find the measurements of the complement and supplement
    9·2 answers
  • HELP FAST PLEASE!!!!!!!!!!!!!!!!!!
    14·1 answer
  • Please help Asap!!!Math question
    6·1 answer
  • Question 1
    15·1 answer
  • Hurry plzzzzzzzzzzzzzzzz
    12·2 answers
  • Please help me with math, explain please
    11·2 answers
  • Please help me with this question! i will give brainiest if correct! (if you show me how to lol i have no idea how)
    7·1 answer
  • My last question pls don’t lie
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!