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Oliga [24]
3 years ago
15

Solve each equation. Showing your reasoning. X^2-6x-20=7

Mathematics
1 answer:
scoundrel [369]3 years ago
4 0

Answer:

x=-3,x=9

Step-by-step explanation:

x^2-6x-20-7=0

x^2-6x-27=0

x^2-(9-3)x-27=0

x^2-9x+3x-27=0

x(x-9)+3(x-9)=0

(x+3)(x-9)=0

x=-3,x=9

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Michael walks 4 1/2 miles in 1 1/4 hours. What is Michael's walking speed, in miles per hour?
gizmo_the_mogwai [7]

Answer:

3 3/5 miles per hour

Step-by-step explanation:

4 1/2=9/2

1 1/4=5/4

(9/2)/(5/4)=(9/2)(4/5)=36/10=18/5=3 3/5

7 0
3 years ago
Solve each system by elimination.<br> −5x − 10y = 15<br> −3x + 10y = 25
yaroslaw [1]

Answer:

\boxed{x = -5~~and~~ y =1}

Step-by-step explanation:

-5x - 10y = 15

<u>-3x + 10y = 25 </u>+

-8x = 40

x = \frac{40}{-8}

x = -5

.

Substitute the value of x to one of equations

-5(-5) - 10y = 15

25 - 10y = 15

-10y = 15 - 25

-10y = -10

y = \frac{-10}{-10}

y = 1

7 0
3 years ago
Read 2 more answers
S
IgorLugansk [536]

Answer:

x=6

Step-by-step explanation:

We know that point C is in the middle of point A and point B.

That means that when these two equations are added they should be equal to the length of AB which is 41.

5x+3x-7=41

add 7 to both sides

8x=48

divide both sides by 8.

x=6

5 0
3 years ago
How do I solve x+2/3=5/6
aleksley [76]
You would subtract 2/3 from 5/6 and that should give you 1/6
x=1/6
4 0
3 years ago
Read 2 more answers
There are five students of different ages. Their median age is 13 years A) what are two possibilities for the ages of the three
Levart [38]
A) the median is the middle measurement. Their ages could be 13, 14 and 15.
B) 2 students must be younger than 13
C) Like I said, the median is the middle measurement. If you have a list of numbers, you have to order them and take the middle number.

:) Have a nice day and maybe consider grading this answer brainliest? <3
6 0
3 years ago
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