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joja [24]
4 years ago
9

If f(x) = 4x + 3(x – 7), what is f(2x)? Simplify your answer.

Mathematics
1 answer:
Hitman42 [59]4 years ago
4 0

Answer: -7 is the answer

Step-by-step explanation:

4(2)+3(2-7)

2-7 is -5

-5 times 3 is -15

4 times 2 is 8

-15+8=-7

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4. Which of the following describes a proportional relationship?
Papessa [141]

Answer:

G. Heather rented a hotel for $110 a night plus $18 a night for valet parking

Step-by-step explanation:

A proportional relationship is one that has a constant ratio between two variables

y/x = Constant

From the given options, the one with a proportional relationship is option G.

The amount at which Heather rented a hotel = $110

The amount he pays for valet parking = $18

The total amount Heather pays a night = $110 + $18 = $128

The amount she pays for 2 nights = 2 × $128 = $256

Therefore, we have;

\begin{array}{cc}x&y\\1&128\\2&256\\3&384\end{array}

From which we get;

y/x = 128/1 = 256/2 = 128 = Constant.

5 0
3 years ago
What is 9 x 10-2<br> as an ordinary number? Give your answer as a decimal.
DochEvi [55]

Answer:

0.09

Step-by-step explanation:

8 0
3 years ago
Help Please. <br><br> 2x(3+x) = 9 <br><br> How do I simplify this using the distributive principle.
Llana [10]

<u>Answer:</u>

2x²+6x-9=0

<u>Step-by-step explanation:</u>

2x(3+x)=9

6x+2x²=9

2x²+6x-9=0

6 0
3 years ago
Does anyone understand this one? I am a little lost.
Harlamova29_29 [7]

Answer:

The graph is decreasing

Step-by-step explanation:

Starting at -1,  the graph goes down to its value at 1

The graph is decreasing

6 0
3 years ago
Sean asked 10 of his classmates the amount of their weekly allowance. He recorded the information in this table. $15 $15 $22 $14
Anarel [89]

The interquartile range = Third quartile - First quartile = 22 - 15 = 7

The range = 25 - 12 = 13

<h3>What is the Interquartile Range (IQR) and Range ofa Data?</h3>

Range = largest data value - the least data value

Interquartile range = Q3 - Q1

Given the following weekly allowance of Sean's classmates as, 15, 15, 22, 14, 12, 24, 16, 25, 15, 15:

Third quartile (Q3) = 22

First quartile (Q1) = 15

Interquartile range = 22 - 15 = 7

Range = 25 - 12 = 13

Learn more about trhe interquartile range on:

brainly.com/question/4102829

#SPJ1

8 0
2 years ago
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