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olga55 [171]
3 years ago
9

GRADUATION HELP PLEASEEEE

Mathematics
2 answers:
Brrunno [24]3 years ago
8 0
= 40 - 56i + 65i - 91i^2
= 40 + 9i + 91
= 131 + 9i

answer is D. 131 + 9i
yuradex [85]3 years ago
4 0
Its simple foil 

(5-7i)(8+13i)

you should know i^2=-1

=40+65i-56i-91i^2
=131+9i
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A) If the line 2x + 3y -8=0 is perpendicular to the line kx-6y =9 find k.​
blsea [12.9K]

Answer:

k = 9.

Step-by-step explanation:

2x + 3y -8=0

3y = -2x + 8

y = -2/3 x + 8/3

So the slope of this line is -2/3.

Therefore the slope of a line perpendicular to the above is -1 /-2/3

= 3/2.

kx - 6y = 9

6y = kx - 9

y = k/6x - 3/2

But the slope is 3/2,

So k/6 = 3/2

2k = 18

k = 9.

3 0
2 years ago
Javier used the equivalent ratios to find the number of millimeters in 8 inches. StartFraction 8 inches Over question mark milli
joja [24]

Answer:

203.20 millimeters

Step-by-step explanation:

StartFraction 8 inches Over question mark millimeters EndFraction = StartFraction 40 inches Over 1,016 millimeters

8 inches / ? Millimeters = 40 inches / 1,016 millimeters

8 × 1,016 = ? × 40

8,128 = 40?

Divide both sides by 40

? = 8,128 / 40

= 203.20

? = 203.20 millimeters

There are 203.20 millimeters in 8 inches

7 0
3 years ago
Read 2 more answers
Please answer this Yall
lora16 [44]
I believe the answer would be b^4.

Explanation:
Use Quotient Rule: x^a/x^b=x^a-b
b^10-6

Then Simplify 10-6 to 4
b^4
5 0
3 years ago
Which two ratios represent qauntities that are proportional
Leokris [45]
Are there answer choices ?
6 0
3 years ago
A backpack is on sale for 30% off. If the sales price is $15.75, what is the original price?
Kryger [21]

Answer:

Your answer is 16.05

Step-by-step explanation:

15.75 + 0.3 = 16.05

16.05 - 0.3 = 15.75

5 0
3 years ago
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