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Ad libitum [116K]
3 years ago
9

Simplify the following polynomial expression. (5x-7)(9x^​2-4x-8)

Mathematics
1 answer:
mihalych1998 [28]3 years ago
3 0

Your answer will be 70x^2 -138x+56

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Given: f(x) = x - 7 and h(x) = 2x + 3 Write the rule for f(h(x)).
azamat
F(h(x)) means wherever you see x in the f(x) function you're gonna plug in the h(x) function:
f(h(x)) = (2x + 3) - 7
= 2x + 3 - 7
= 2x - 4
6 0
3 years ago
Read 2 more answers
Evaluate.
snow_lady [41]

Replace a and b with their given values:

(2(3/5) -1/3) / -6.75/15

2 x 3/5 = 6/5

6/5 - 1/3 = 18/15 - 5/15 = 13/15

13/15 / -6.75/15 = 13/15 x 15/-6.75  = (13 x 15) / (15 x -6.75) = 195/-101.25  = -1 25/27

Answer: -1 and 25/27

8 0
2 years ago
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What is the sign of −4ab when a>0 and b<0?
AVprozaik [17]

Answer:

A

Step-by-step explanation:

We have the expression:

-4ab

And we want to find its sign given that a>0 and b<0.

Notice that the expression is already negative since we have -4.

a>0 means that a is positive. Therefore, we can ignore it since it won’t do anything.

b<0 means that b is negative. Therefore, we will have two negatives being multiplied together. Hence, this will make a positive.

Therefore, the sign of our expression will be positive.

We can see this with an example. Let a=1 (1>0) and let b=-1 (-1<0). Then:

-4(1)(-1)=4

So, the sign is positive.

Hence, the answer is A.

7 0
3 years ago
Hey! please help i’ll give brainliest! if it lets me:)
lozanna [386]

Answer:

south since its the opposite

5 0
3 years ago
Help plsssss no links plss
Nataly [62]
Perimeter:62 area:84
3 0
2 years ago
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