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8 months ago

4x - 7 = 3x + 4 = 5x - 9

Mathematics

2 answers:

mamaluj [8]8 months ago

8 0

Here you go :)
check the working below

olga_2 [115]8 months ago

7 0

Answer:

Step-by-step explanation:

$4x−73x+45x−9$

Combine 4x and −73x to get −69x.

$−69x+45x−9$

Combine −69x and 45x to get −24x.

$−24x−9$

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almond37 [142]

Answer:

(D) Each year,the machinery loses a value of 4,500

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2 years ago

A sample of n=8 scores has a mean of m=12. What is the value of ∑x for this sample

Andrews [41]

A sample of n=8 scores has a mean of m=12. What is the value of ∑x for this sample

Answer: We are given the mean of 8 scores is 12.

We are required to find the sum of these 8 observation's, $\sum x$

We know that:

$\bar{x}=\frac{\sum x}{n}$

We are given:

$\bar{x} = 12, n=8$

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2 years ago

Please Help me this is the first part of 4 in this question. I will be posting the other 3 shortly. I need the answer. This is v

Ket [755]

Answer:

y = 1/6x + 5

Step-by-step explanation:

-x + 6y = 30

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1 year ago

A limited-edition poster increases in value each year with an initial value of $18. After 1 year and an increase of 15% per year

Roman55 [17]

Answer:

The required equation is $y = 18(1.15)^x$ .

Step-by-step explanation:

Consider the provided information.

The Initial value of poster = $ 18

After 1 year amount of increase = $ 20.70

With the rate of 15% = 0.15

Let future value is y and the number of years be x.

$y = 18(1.15)^x$

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2 years ago

Read 2 more answers

Solve each system by elimination.<br> 1) 10x + 7y=9 -4x - 7y=9

stellarik [79]

Answer:

(3, -3)

Step-by-step explanation:

When asked to solve by elimination, you put them on top of one another, like you're going to add it.

10x + 7y = 9

-4x - 7y = 9

See that 7y? You can cancel those out because one is negative, and one is positive. So those are gone. You finish adding the rest of the numbers as usual and solve for x.

6x = 18

x = 3

Take x, and plug it into either equation to find y.

10(3) + 7y = 9

7y = -21

y = -3

(3, -3)

Hope this helped!

8 0

2 years ago