Expand.
Your answer should be a polynomial in standard form.
(-8a^2 – 1) (3a^2– 5) =

Rewrite using the commutative property of multiplication.

−8⋅3(a2a2)−8a2⋅−5−1(3a2)−1⋅−5

Multiply a 2 by a 2 by adding the exponents.

Use the power rule a m a n = a m + n to combine exponents.

− 8 ⋅ 3 a 2 + 2 − 8 a 2 ⋅ − 5 − 1 ( 3 a 2 ) − 1 ⋅ − 5

Multiply−8by3.−24a4−8a2⋅−5−1(3a2)−1⋅−5

Multiply−5by−8.−24a4+40a2−1(3a2)−1⋅−5

Multiply3by−1.−24a4+40a2−3a2−1⋅−5

Multiply−1by−5.−24a4+40a2−3a2+5

Subtract3a2from40a2.−24a4+37a2+5

Step-by-step explanation: Please hep me with this if you know!

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

no

step-by-step explanation: