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Nezavi [6.7K]
3 years ago
14

John claims the following two expressions are equivalent.

Mathematics
1 answer:
MrRissso [65]3 years ago
3 0

Answer:

the answer is B. He should have only multiplied 3 by –2 resulting in the expression 5y – 6.

Step-by-step explanation:

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There is a sales tax of $6 on an item that costs $64 before tax. The sales tax on a second item is $8.25 . How much does the sec
bulgar [2K]
The second item would be $88 before tax since the tax rate is <span>9.375%</span>
5 0
4 years ago
In 1990 the average family income was about $ 39 , 000 , and in 2010 it was about $ 70 , 768 . Let x = 0 represent 1990, x = 1 r
iren2701 [21]

Answer:

<em />f(x) = 1588.4x + 39000<em />

f(15) = 62826

Step-by-step explanation:

Given

In 1990; Income= $39000

In 2010; Income= $70768

Solving (a): An equation in form of f(x) = ax + b

First, we need to determine the slope, a

a = \frac{y_2 - y_1}{x_2 - x_1}

Taking y as income and x as year index.

When x = 0; y = 39000

When x = 20; y = 70768

Substitute these values in the above formula

a = \frac{70768 - 39000}{20 - 0}

a = \frac{31768}{20}

a = 1588.4

Next, is to determine the formula using:

y - y_1 = a(x - x_1)

<em>Considering :When x = 0; y = 39000, we have</em>

<em />y - 39000 = 1588.4(x - 0)<em />

<em />y - 39000 = 1588.4x<em />

<em>Make y the subject of formula</em>

<em />y = 1588.4x + 39000<em />

<em />

<em>Express y as a function of x</em>

<em />f(x) = 1588.4x + 39000<em />

Solving (b): Income in 2005

<em>In 2005, x = 15</em>

So:

f(x) = 1588.4x + 39000 becomes

f(15) = 1588.4 * 15 + 39000

f(15) = 62826

3 0
3 years ago
PLZZZZZ Help I will Give Brainliest
yarga [219]

Answer:

See below

Step-by-step explanation:

A) In part 1, the bus is increasing in speed. In part 2, the bus keeps a steady pace. In part 3, the bus is slowing down. In part 4, the bus is once again keeping a steady pace. In part 5, the bus is increasing in speed once again.

B) Parts 1 and 5 are increasing, part 3 is decreasing, and parts 2 and 4 are constant.

C) This graph is non-linear. Linear means straight, and this graph is constantly increasing and decreasing. Thus, it is non-linear.

7 0
3 years ago
PLEASE HELP.<br>What is the slope of theine graphed below​
Aleks04 [339]
The slope is 3/2

Steps:
4 - (-2) = 6

5 - (-4) = 9

Put into a fraction, with the y sum on top.

Reduce

5 0
3 years ago
Read 2 more answers
Factor the expression below x^2-64
Georgia [21]

Answer:

(x + 8) (x-8)

Step-by-step explanation:

x^2-64

Solve

a^2 - b^2 = (a+b) (a-b)

Where a = x , b = 8

(x + 8) (x-8)

6 0
3 years ago
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