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dedylja [7]
3 years ago
13

4(5 + 2x) -5 = 3(3x + 7)

Mathematics
1 answer:
Pie3 years ago
5 0

Answer:

x =  -1

Step-by-step explanation:

The first step is get rid of the numbers outside this (). So we will get

20+8x=9x+21 (multiplication) And we can get rid of one side of x by subtract 8x on both sides, an then we will get 20= x+21

And we can move the numbers to one side by subtract 21 on each side, and we will get -1=x

And rewrite it:

x = -1

That's the answer.

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James determined that these two expressions were equivalent expressions using the values of x = 4 and x = 6. Which statements ar
zalisa [80]

Answer:

first and third

Step-by-step explanation:

8 0
3 years ago
To find out how fast a tree grows, you can measure its trunk. A giant red oak's diameter was 248 inches in 1965. The tree's diam
professor190 [17]
Any times you see the phrase: "Rate of Change", or even sometimes just the word "Rate" think slope. 

The word slope is just a fancy word that means the rate of change. 

Rate of Change is just a fancy phrase meaning how much does something change over some amount of time. 
So in this case our rate of change will have the units of inches per year. 

Let's get to the problem at hand! 
We'll need to find slope / the rate of change (the two are interchangeable with each other).
Let's go over the formula for slope:

m = (y2 - y1) / (x2 - x1) 

First we will need to label each of the "coordinated points (the two numbers that go together in a pair)" with either (x1,y1) or (x2,y2). 

A Giant Red Oak's diameter in 1965 was 248 inches. Keep in mind time is ALWAYS going to be X in rate of change problems (and most all problems for that matter).  

(1965,248) 
(X1,Y2)

(2005,251)
(X2,Y2)

Plug in the values into the equation!
m = (y2 - y1) / (x2 - x1)
m = (251 - 248) / (2005 - 1965) 
m = (3) / (40)

Type that into a calculator to get a decimal value over 1.
m = 0.075 inches per 1 year. 
Or... 

m = 0.075in / 1 year
8 0
3 years ago
Which of the following is a pair of vertical angles ?
nikklg [1K]
Vertical angles<span> are the angles opposite each other when two lines cross, so 
</span>∠AOB and ∠DOC are vertical.
5 0
3 years ago
Read 2 more answers
jenny won the ping pong championship eight more times than gerardo. they have won a combined total of 32 championship
Lena [83]
X + x +8 = 32
2x + 8 = 32
2x = 24
x = 12
So gerardo has won 12 and jenny has won 20
3 0
3 years ago
Question : Which of the following is closest to 27.8 x 9.6?<br><br>280 300 2800 3000​
sineoko [7]

Answer:

ITS 280

Step-by-step explanation:

Rounding - when you solve

27.8 x 9.6 = 266.88

thats nearest to 280

:) Have a great day

6 0
3 years ago
Read 2 more answers
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