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3 years ago

Whích two of the following expressions is equivalent

Mathematics

1 answer:

kobusy [5.1K]3 years ago

7 0

I cant see the other number your mouse is blocking it

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The four folded parts of an envelope are opened up to create this figure. What is the surface area of one side of the unfolded e

vichka [17]

Answer:

Option C. 50 square centimeters

Step-by-step explanation:

we know that

The surface area is equal to the area of four triangles plus the area of rectangle

$SA=2[\frac{1}{2}(4)(2)]+2[\frac{1}{2}(6)(3)]+(6)(4)$

$SA=8+18+24$

$SA=50\ cm^{2}$

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3 years ago

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Pine Bluff Middle School is having its annual Spring Fling dance, which will cost

Anon25 [30]

I think your asking how much the school will have left over. If so:

125 ( not including the tickets)
It depends on how many kids are coming to the dance in order to fully solve this problem.

You didn't word this properly so that what I got with what I had:)

If you have anymore questions, ask me them on my profile so I'll be sure to get them:)

I hope this helps:)

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3 years ago

How many solutions will the following system of linear equations have? –2x + 4y = –7 y= -1/2x + 5 A. 0 B. 1 C. 2 D. infinite

FinnZ [79.3K]

Answer:

B. 1

Step-by-step explanation:

they only cross at one point... look below

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3 years ago

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Why is 1 + (−5) equal to −4? (1 point)

Dafna11 [192]

I'm pretty sure it's D

Filler to post

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3 years ago

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If $-2 < x \le 3,$ then find all possible values of $5x + 1.$ Give your answer in interval notation.

kotegsom [21]

Answer: $(-9, 16]$

This is the interval from -9 to 16. Exclude -9 but include 16.

=====================================================

Work Shown:

The idea is to multiply all sides by 5, then add 1 to all sides

$-2 < x \le 3$

$5(-2) < 5x \le 5(3)$

$-10 < 5x \le 15$

$-10+1 < 5x+1 \le 15+1$

$-9 < 5x+1 \le 16$

This converts to the interval notation $(-9, 16]$

note: a curved parenthesis means "do not include this value in the solution set"; while a square bracket has us include the value. So we exclude -9 and include 16.

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3 years ago