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DanielleElmas [232]
3 years ago
8

What is the solution to the system of equations {−3x+5y=12 7x−5y=−28?

Mathematics
2 answers:
Tatiana [17]3 years ago
8 0

Answer:

\boxed{x = -4~~and~~y = 0}

.

Step-by-step explanation:

Use elimination

-3x + 5y = 12

<u>7x - 5y = -28  </u>+

4x = -16

x = \frac{-16}{4}

x = -4

.

Subsitute the value of x to one of equations

-3x + 5y = 12

-3(-4) + 5y = 12

12 + 5y = 12

5y = 12 - 12

5y = 0

y = \frac{0}{5}

y = 0

.

Happy to help :)

V125BC [204]3 years ago
5 0

Answer:

x=-4 and y=0

Step-by-step explanation:

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What is the value of x + y(3 - x) when x = -5 and y = 3?
cestrela7 [59]

Answer:

E. 19

Step-by-step explanation:

Step 1: Plug in the x and y values mentioned:

-5 + 3(3 - (-5))=

Step 2: Distribute the three:

-5 + 9+15=

Simplify:

19

<em>Hope this helped and plz mark as brainliest!</em>

<em></em>

<em>Luna G.</em>

4 0
3 years ago
Choose all that correctly solve for x.
Tamiku [17]

Answer:

Options: A, B, and C correctly solve for x.

Step-by-step explanation:

A).

\frac{5}{2} x = \frac{15}{2}

Multiplying both sides by 2 gives;

5x = 15

x = 15 ÷ 5 = 3

∴ This option correctly solve for x.

B).

x + \frac{7}{2} = 7

x = 7 - \frac{7}{2} = \frac{14}{2} -\frac{7}{2} = \frac{7}{2}

∴ This option correctly solve for x.

C).

x + 3 = \frac{21}{5}

x = \frac{21}{5} - \frac{15}{5}  = \frac{6}{5}

But the option give x as 5/6 hence this option does not correctly solve for x.

D).

5x = 11/2

x = 11/2 ÷ 5 = 11/2 × 1/5 = 11/10

But the option gives x as 10/11 so it does not correctly solve for x.

8 0
3 years ago
Cameron had 30 minutes to do a three problem quiz. He spent 8 3/4 minutes on question A and 5 1/2 minutes on question B. How muc
Delvig [45]
He has 15 and 3/4 minutes left over
3 0
2 years ago
What is?Two consecutive odd integers have a sum of -44. What are two odd integers?
9966 [12]
Let one odd integer = x

other odd integer = x +2

Sum = x + x+2 = -44

=> 2x + 2 = -44

=> 2x = -44 -2 = -46

=> x = -46/2 = -23

x+2 = -23 + 2 = -21

Integers are -23 and -21
5 0
3 years ago
A children's slide has a length of 5.8m. The vertical ladder is 2.6m above the groubd. Find the angle the slide makes with the g
Elodia [21]

<u>Answer</u>


26.6°


<u>Explanation</u>

You are required to use the trigonometric ratio, sine, to find that angle.

SinФ = opposite/hypotenuse


sin Θ = 2.6/5.8

= 0.4483


The angle Θ = Anti-sine(0.4483)

= 26.633°


The angle the slide makes with the ground, correct to one decimal place is 26.6°

8 0
3 years ago
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