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rodikova [14]
3 years ago
6

I have this weird question that has to do with linear equations (I think), and this is what it says. Let f(x) = 4x - 5 A. Find f

(3) B. Find x when f(x) = -21 Can somebody help me understand this ? ?
Mathematics
1 answer:
hjlf3 years ago
7 0
f(3)=4\cdot3-5=12-5=7\\\\
4x-5=-21\\
4x=-16\\
x=-4
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X is a positive integer and 15x - 43 < 5x + 2. Work out the possible values of x.​
Mice21 [21]

Answer:

x = 1, 2, 3, 4

Step-by-step explanation:

15x - 43 < 5x + 2

15x - 5x - 43 < 2

15x - 5x < 2 + 43

10x < 45

x < 4.5

x = 1, 2, 3, 4

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3 years ago
The temperature was –15⁰F and decreased by 10⁰ F. Which statement represents the resulting temperature in degrees Fahrenheit?
Alex_Xolod [135]

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Step-by-step explanation:

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3 years ago
2/5 x 6/7= I cant figure out this question.
telo118 [61]

Answer:

I got 0.3428571429

Step-by-step explanation:

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4 0
2 years ago
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suppose you create a graph of the cost function, c=20n + 500 of a new bookstore, and you also graph the revenue function, r=25n,
sdas [7]

Answer:

Loss section

Step-by-step explanation:

Given

c = 20n + 500 -- cost

r = 25n -- revenue

Required

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To do this, we substitute 150 for n in the given functions

c = 20n + 500

c = 20 * 150 + 500

c = 3500

r = 25n

r = 25 * 150

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The above shows that the revenue is greater than cost for n = 150.

This implies that, n = 15o is the loss section.

6 0
2 years ago
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2y-2=3/2y. 10x-4=5x
GREYUIT [131]
2y-1.5y=2
0.5y=2
y=1
10x-5x=4
x=4/5
8 0
3 years ago
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