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In-s [12.5K]
3 years ago
9

20 if f(x) = 4x + 5, what is the value of f(-3)? A-2 B-7 C 17 04

Mathematics
1 answer:
Juliette [100K]3 years ago
5 0

Answer:

B. -7

Step-by-step explanation:

f(x) = 4x + 5

To find the value of f(-3), replace all the x's in f(x) with -3.

f(x) = 4x + 5

f(-3) = 4(-3) + 5

f(-3) = -12 + 5

f(-3) = -7.

This makes your answer B, -7.

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Suppose the relationship between x and y is proportional. When x is 7 ​, y is . 147 Identify the constant of proportionality of
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Step-by-step explanation:

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3 years ago
When x increases from a to a + 2, y increases by a difference of 8. For which functions is this statement true?
lord [1]

Answer:

That would be Option C.

Step-by-step explanation:

Lets look at y = 4x + 2:-

Let x = a then y = 4a + 2

Now if x in creases to a +2,  y = 4(a +2) + 2 = 4a + 8 + 2

= 4a + 10.

(4a + 10) - (4a + 2) = 8  ,  so this is the required expression, y = 4x + 2.

6 0
3 years ago
Hey guys! I am having trouble with this question and would love it if someone would explain to me step-by-step how to get the an
Lady_Fox [76]

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5 0
3 years ago
Write -6/11 * 3/4 lowest terms​
Andrej [43]

Answer:

(-\frac{6}{11})  \times( \frac{3}{4}) = -(\frac{9}{22} )  in the lowest terms.

Step-by-step explanation:

Here, the given expression is : (-\frac{6}{11})  \times( \frac{3}{4})

Solving the given expression, we get:

(-\frac{6}{11})  \times( \frac{3}{4})  = \frac{-6 \times 3}{11 \times 4}   =- \frac{18}{44}

Now, to express the fraction into lowest terms

18 = 2 x 3 x 3,                       44  =  2  x 2 x  11

So, -\frac{18}{44}  = -(\frac{2 \times 3 \times 3}{2 \times 2\times 11} )  = -(\frac{9}{22} )

Hence, (-\frac{6}{11})  \times( \frac{3}{4}) = -(\frac{9}{22} )  in the lowest terms.

7 0
3 years ago
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 120 months, with a
IrinaK [193]

Answer:

P(X<118.81)=0.0803

Step-by-step explanation:

Assuming the distribution for the mean life is approximately normal, with mean 120 months and variance 64 months^2, we can calculate the parameters for a sampling distribution with sample size = 89 computers.

The sampling distribution mean will be equal to the mean for a single computer:

\mu_{89}=\mu=120

The standard deviation will be adjusted by the sample size as:

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With these parameters, we can calculate the z-score for X=118.81.

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Then, the probability that the mean of a sample of 89 computers is less than 118.81 months is:

P(X

7 0
3 years ago
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