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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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Can anyone help me with my homework
enyata [817]
Answer-
1. 3(2) + 5=6+5 = 11
2. 4(3) - 7 =12-7= 5
3. 2(3) - 4 =6-4 = 2
4. 6(4) - 2(3) =24-6 = 18
5. 2+3-4+5 = 5-4+5= 1+5 = 6
6. 7(4) - 2(2) = 28-4= 24
7. 2(3)(4) + 1 = 24+1 = 25
8. 2(3)(4) - 4 = 24-4 = 20
9. 8(2) /4 = 16/4 = 4
10. 6(3)/2 =18/2 = 9
11. 4(2) + 7 = 8+7 = 15
12. 2(4) - 7 = 8-7 = 1
13. 2(3) + 3(2) = 6+6 = 12
14. 6(2) - 1 = 12-1 = 11
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8 0
3 years ago
5x -2x +6x +40 -9 +1 -x +3x -8 +15x +7
creativ13 [48]
X=28582 that is the sender
4 0
3 years ago
What’s the slope of this graph
rusak2 [61]

Answer:

The slope in this graph is 6

8 0
3 years ago
Read 2 more answers
As a reward for being name employee of the year Janice will receive a 3.5 pay raise . If Janice new salary is 45,000 how much wa
satela [25.4K]

Answer:

Salary before pay raise = 43,478.26 (approx)

Step-by-step explanation:

Given that:

Janice new salary = 45,000

Pay raise = 3.5% = 0.035

Let the previous pay be x

Now according to given conditions:

0.035* x = 45,000 - x

Adding x on both sides we get:

0.035 x + x =  45,000 - x + x

1.035x =  45,000

Dividing both sides by 1.035 we get:

1.035/1.035 x =  45,000/1.035

x = 43,478.26

So, the salary before pay raise was 43,478 approx

proof:

Raise in salart = 3.5% of 43,478.26 = 1,521.74

New salary = old salary + raise in salary

New salary = 43,478.26 + 1,521.74

New salary = 45,000

Hence proved.

I hope it will help you!

7 0
3 years ago
Read 2 more answers
Determine how many, what type, and find the roots for f(x) = x^4 + 21x^2 -100.
Tcecarenko [31]
Among the coefficient signs (++-) there is one sign change, so Descarte's rule of signs tells you there is one positive real root. Changing x to -x does not affect the signs, so there is also one negative real root. Then there are two complex roots to bring the total number to 4, the degree of the polynomial.

The factorization is
  f(x) = (x^2 +25)(x^2 -4)
Each of these can be factored using the form for factoring the difference of squares.
  f(x) = (x -5i)(x +5i)(x -2)(x +2)

There are 2 real roots: ±2.
There are 2 imaginary roots: ±5i.
8 0
3 years ago
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