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marishachu [46]
3 years ago
15

If x – 10 is a factor of x2 – 8x – 20, what is the other factor?

Mathematics
2 answers:
kkurt [141]3 years ago
5 0

Answer:

Step-by-step explanation:

x²-8x-20

=x²-10x+2x-20

=x(x-10)+2(x-10)

=(x-10)(x+2)

second factor is x+2

Annette [7]3 years ago
3 0

Answer:

(x-10)(x+2)

Step-by-step explanation:

x^2 – 8x – 20

Factor

What 2 numbers multiply to -20 and add to -8

-10 *2 =-20

-10+2 = -8

(x-10)(x+2)

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X+413=−256 <br> What is the value of X?
Phantasy [73]

Answer:

-669

Step-by-step explanation:

Convert -256 to 256

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669

Convert 669 to -669

X=-669

Double Check:

-669+413=-256

8 0
2 years ago
Help please with algebra problem
Strike441 [17]
Number of weekend minutes used: x
Number of weekday minutes used: y

This month Nick was billed for 643 minutes:
(1) x+y=643

The charge for these minutes was $35.44
Telephone company charges $0.04 per minute for weekend calls (x)
and $0.08 per minute for calls made on weekdays (y)
(2) 0.04x+0.08y=35.44

We have a system of 2 equations and 2 unkowns:
(1) x+y=643
(2) 0.04x+0.08y=35.44

Using the method of substitution
Isolating x from the first equation:
(1) x+y-y=643-y
(3) x=643-y

Replacing x by 643-y in the second equation
(2) 0.04x+0.08y=35.44
0.04(643-y)+0.08y=35.44
25.72-0.04y+0.08y=35.44
0.04y+25.72=35.44

Solving for y:
0.04y+25.72-25.72=35.44-25.72
0.04y=9.72

Dividing both sides of the equation by 0.04:
0.04y/0.04=9.72/0.04
y=243

Replacing y by 243 in the equation (3)
(3) x=643-y
x=643-243
x=400


Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
6 0
2 years ago
A line with a slope of O passes through the point (1, 10). What is its equation in
Burka [1]

Answer: Y = 10

Step-by-step explanation:

Because it is a horizontal line, the equation will just be Y = the Y value

5 0
3 years ago
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