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2 years ago

PLEASE HELP ME IM STUCK

Mathematics

2 answers:

Tanya [424]2 years ago

8 0

Answer:

Step-by-step explanation:

$(5x^{2} + 7) - (3x - 2)\\5x^{2} + 7 - 3x - (-2)\\5x^{2} + 7 - 3x + 2\\ B - 5x^{2} - 3x + 9\\$

Tems11 [23]2 years ago

3 0

Answer:

5x^2 -3x +9

Step-by-step explanation:

To subtract, line up the common terms. I add a 0 term to keep the terms in line.

5x^2 + 0x +7

- (0x^2 +3x- 2 )

------------------------

Distribute the negative sign.

5x^2 + 0x +7

- 0x^2 -3x + 2

------------------------

5x^2 -3x +9

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Read 2 more answers

Can someone please help me

Bad White [126]

Answer:

Step-by-step explanation:

Lateral Area:

We have four congruent triangles with base b = 16cm and height h = 12cm.

The formula of an area of a traingle:

$A_\triangle=\dfrac{bh}{2}$

Substitute:

$A_\triangle=\dfrac{(16)(12)}{2}=(8)(12)=96\ cm^2$

$L.A.=4A_\triangle=4(96)=384\ cm^2$

Surface Area:

$S.A.=B+L.A.$

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$A_\square=s^2$

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