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Sauron [17]
4 years ago
11

If the area rectangle below us 39 square feet find the x value

Mathematics
1 answer:
Leya [2.2K]4 years ago
7 0

Answer:

x=5 and x=-11

Step-by-step explanation:

(x-2)(x+8)=39

x^2+6x-16=39

Subtract 39 from both sides

x^2+6x-55=0

Factor:

(x-5)(x+11)=0

Set factors to 0.

x-5 =0

x+11 =0

x=5, x=-11

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Martin earns $18 dollars an hour. Which of the following inequalities represents the amount of time martin needs to work to earn
OverLord2011 [107]

Answer:

18t >= 78

Step-by-step explanation:

Not sure if there's an equals sign in the problem that you were given, but there should be. The 18 in the inequality stands for the hourly wage. The t stands for hours worked. 18(wage) x t(hours) has to be greater than or equal to 78 in order for Martin to at LEAST $78 per day. :)

5 0
2 years ago
Let f(x) = 3x + 8 and g(x) = x2<br> Find (f.g)(x).
puteri [66]

Answer:

You just plug it in.

Step-by-step explanation:

8 0
3 years ago
Helppp please if anyone know
zmey [24]
81 - 35+30 (55) = 26 therefore 26cm is ur final answer
7 0
3 years ago
Read 2 more answers
What is the slope between these two points? (-5, 2) and (2,8). You must show your work for this problem. *
tatyana61 [14]

Answer:

6/7

Step-by-step explanation:

Given the points :

(-5, 2) and (2, 8)

Slope can be obtained by using the relation :

(y2 - y1) / (x2 - x1)

From the points given :

x1 = - 5 ; y1 = 2 ; x2 = 2 ; y2 = 8

(8 - 2) / (2 - (-5))

(8 - 2) / (2 + 5)

6 / 7

Hence, slope between the two points = 6/7

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3 years ago
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