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2 years ago

What is the solution for the systems of equations below?

1 answer:

3 0

Use elimination
3x + 4y = -2
2x - 4y = -8
Add both equations
5x = -10, x = -2
3(-2) + 4y = -2
-6 + 4y = -2
4y = 4, y = 1
Solution: x = -2, y = 1

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A. 8.5 B. 8.4 C. 8.3 D. 8.6 @mathstudent55

Roman55 [17]

C. 8.3

to solve use cos 32 = 7/x
x = $\frac{7}{cos (32)} =8.25424...$

7 0

3 years ago

4x < 16 or 12x > 144

Leviafan [203]

$4x < 16\ or\ 12x > 144\\\\x < 16:4\ or\ x > 144:12\\\\x < 4\ or\ x > 12\\\\x\in(-\infty;\ 4)\ \cup\ (12;\ \infty)$

4 0

2 years ago

Please and thank you!

PIT_PIT [208]

Answer:

Step-by-step explanation:

3 0

2 years ago

What is the value of sine of begin argument 45 degrees end argument?

nirvana33 [79]

Answer:

Option A

fraction numerator square root of 2 over denominator 2 end fraction

Step-by-step explanation:

The answer can be obtained using a calculator.

It corresponds to a notable identity

sin (45) = $\sqrt{2}$ / 2

sin (45) = 0.7071

$\sqrt{2}$ / 2 = 0.7071

Please see attached picture

5 0

2 years ago

A group of friends went to the movies. They shared 2 bags of popcorn equally. If each person got 2/3 of a bag of popcorn, how ma

Gemiola [76]

Answer:

There would have been three people in the group.

Step-by-step explanation:

This is because if you add 2/3 together until you get that amount, it will add up to having three people. If this sounds confusing, here is a visual thing to help.

2/3+2/3=4/3 which can also equal 1 1/3

1 1/3 + 2/3 =2

you added 2/3 together three times to get two, so three is the answer.

Hope this helps!

4 0

2 years ago