3 years ago

Add: -5g^2+(-9g^2-8)

Mathematics

1 answer:

Amiraneli [1.4K]3 years ago

3 0

Answer:

$\boxed{-14g^2 - 8}$

Step-by-step explanation:

$-5g^2 + (-9g^2 - 8)$

$= - 5g^2 - 9g^2 - 8$

$= -14g^2 - 8$

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3 years ago

Help!! Can someone explain this to me I’m not getting it.

chubhunter [2.5K]

Answer:

A. 99 sq cm

Step-by-step explanation:

Area of geometric shape

= 2 times the area of one triangle with base a and height c

+ 2 times the area of one triangle with base c and height b

+ Area of rectangle with dimensions a and c.

$= 2 \times \frac{1}{2} ac + 2 \times \frac{1}{2} bc + ac \\ \\ = ac + bc + ac \\ \\ = 2ac + bc \\ \\ = 2(13)(3) + 7(3) \\ \\ = 78 + 21 \\ \\ = 99 \: sq \: cm$