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Sedaia [141]
3 years ago
12

Which of the following ordered pairs represents the solution to the system given below?

Mathematics
2 answers:
castortr0y [4]3 years ago
8 0
X − 4y = 7
5x + 9y = 6

5x − 20y = 35  //1st * 5
5x + 9y = 6

5x +9y - 5x + 20y = 6 - 35  //2nd - 1st
5x + 9y = 6

29y=-29
5x=6-9y

y=-1  //1st : 29
5x=6-9*(-1)

y=-1
x=15:5 //2nd : 5

y=-1
x=3

check:
for x=3 and y=-1 there is:
x − 4y = 7 is 3 − 4*(-1) = 7 is 7=7 ok
5x + 9y = 6 is 15-9=6 is 6=6 ok

answer: (3;-1) represents the solution.

Law Incorporation [45]3 years ago
3 0

Answer:

It’s 3,-1

Step-by-step explanation:

You have to plug in the points u can use a calculator or work it by hand but I did it on the calculator and that’s what I got

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Afina-wow [57]

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Step-by-step explanation:

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5 0
3 years ago
2x + 5y + 30 = 0 The point ( 5/2 , y) is a solution to the equation shown. What is the value of y? A) -7 B) -5 C) 0 D) 5
Zigmanuir [339]

Answer:

A) -7

Step-by-step explanation:

2x + 5y + 30 = 0

Let x = 5/2

Substitute into the equation

2(5/2) +5y +30 =0

5+5y+30=0

Combine like terms

35 +5y =0

Subtract 35 from each side

35-35 +5y = -35

5y=-35

Divide by 5

5y/5=-35/5

y = -7

6 0
4 years ago
Find tan(B) in the triangle.
solong [7]

Answer:

<em>tanB</em><em>=</em>p/b

tanB=3/4

B=tan-¹(3/4)=17.89=18° is your answer.

6 0
3 years ago
What is the value of the expression -35.62/2.6 *
maria [59]

Answer:

-13.7

Step-by-step explanation:

when you divide -35,62 by 2.6 you get -13.7

Done! Hope you learned how to do this/understood this and have a great day! Please mark me as brainliest, vote 5.0 on my answer and thank me to show some support! Bye!

3 0
3 years ago
Read 2 more answers
Given a cylinder with a radius of 5cm and a height of 8 cm, find the volume of the cylinder. Use 3.14 for T.
Radda [10]

Answer: V=628cm³

Step-by-step explanation:

V=(3.14)r²h

V=(3.14)(5²)(8)

V=628cm²

Hope this helps! Have a great night!

6 0
3 years ago
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