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2 years ago

Solve 4(x-3 )+x =2x+9 and justify your solution

Mathematics

2 answers:

ella [17]2 years ago

7 0

Answer:

X=7

Step-by-step explanation:

Multiply your 4 out on the left side to get

4x-12+x=2x+9

combine like terms on left side

5x-12=2x+9

get the x's by them selves

3x=21

divide both sides by 3

x=7

hope this helps

klio [65]2 years ago

6 0

X=7
after you remove parentheses you do those steps

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From Denver yo Chicago =3in if the scale is 1in=300miles

Amiraneli [1.4K]

Basically a proportion so it’d be 1in/300 mi = 3in/x mi
cross multiple that out and you get 300•3=x and then just solve for x. the answer should be 900 miles.

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3 years ago

Meg is 6 years older than Victor. Meg's age is 2 years less than five times Victor's age. The equations below model the relation

Verdich [7]

Since no possible correct method is posted, I will suggest a couple.

Method 1: guess and check

Works well for simple problems involving integers like this one.

Victor's age must be zero or greater than one, say one.

Guess v=1, find m=v+6=7, check m=5v-2=5-2=3 no good.

we need to make v bigger

Guess v=2, find m=v+6=2+6=8, check m=5v-2=5*2-2=8 ✔

So v=2, m=8.

Method 2:

Solve the system of two equations.

since the left-hand sides is m in both equations, and since m=m, we just have to equate the right-hand sides to solve for v.

5v-2=v+6

Solve for v

5v-v = 6+2

4v=8

v=2,

so again, v=2, m=v+6=2+6=8.

6 0

3 years ago

the length of a rectangle is 4 1/6 inches and the width of the rectangle is 8 2/3 inches what is the area of the rectangle

V125BC [204]

36 1/9 is the area
thanks

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3 years ago

All of the following are names of spheres shown except<br> Т<br> S<br> А

FrozenT [24]

Answer: Don't know sorry

Step-by-step explanation:

7 0

3 years ago

1) The table and graph shows the relationship between GPA, X, and SAT score, y.

Artist 52 [7]

The statement (A), statement (B), statement (D) are correct because the equation is y = 437.9x + 439.4

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

From the data given, we can calculate the correlation coefficient, slope of the line, and y-intercept.

r = 0.90

Since r is close to 1 shows a strong correlation.

Slope of the line of best fit = 437.9

Y-intercept of line of the best fit = 439.4(Refer to the attached picture)

The line will be:

y = 437.9x + 439.4

Thus, the statement (A), statement (B), statement (D) are correct because the equation is y = 437.9x + 439.4

Learn more about the line of best fit here:

brainly.com/question/14279419

#SPJ1

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2 years ago