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3 years ago

12x+5=4x? Show steps, please.

Mathematics

1 answer:

gavmur [86]3 years ago

6 0

Answer:

x = 5/-8

Step-by-step explanation:

4x = 12x + 5

4x - 12x = 5

-8x = 5

x = 5/-8

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Find the value of x. 7 D 3 B В х С X =

bekas [8.4K]

Answer:

x = $\sqrt{30}$

Step-by-step explanation:

Using the Altitude- on- Hypotenuse theorem

(leg of Δ ABC )² = (part of hypotenuse below it ) × ( whole hypotenuse )

x² = 3 × (3 + 7) = 3 × 10 = 30 ( take the square root of both sides )

x = $\sqrt{30}$

7 0

3 years ago

Three groups of students used different methods to estimate the diagonal length of a patio in feet. Their results were:

podryga [215]

F14.33 1425,413 that’s the right number

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3 years ago

A web site charges $0.99 to download a game and a 12.49 membership fee.write an expression that gives the total cost in dollars

icang [17]

Hello!

To write this equation we will use c to represent the total cost, and g to represent however many games you download.

c=12.49+0.99g

The constant rate is 12.49, that will never increase or change in our equation.

Depending on how many games you download, that will be the rate that affects our total cost.

If you only purchase one game, you only spend $13.48. Where as if you buy 10 games, you spend $22.39.

3 0

3 years ago

Translate the given phrase into an algebraic expression and simplify if possible: the difference of −5 and −30.

lawyer [7]

Answer:

IIaI-IbII

Step-by-step explanation:

II-30I-I-5II=

I30-5I=

I25I=

II-5I-I-30II=

I5-30I=

I-25I=

8 0

2 years ago

A linear regression is done on data the line of best fit is y= 1.25x-6.25. What is the residual for the point (1,1)?

Damm [24]

Answer:

Step-by-step explanation:

Find the predicted y value when x=1:

$\hat{y}=1.25x-6.25\\\hat{y}=1.25(1)-6.25\\\hat{y}=1.25-6.25\\\hat{y}=-5$

Find the residual:

$\text{Residual}=\text{Actual Value}-\text{Predicted Value}\\\text{Residual}=y-\hat{y}\\\text{Residual}=1-(-5)\\\text{Residual}=1+5\\\text{Residual}=6$

Because our residual is positive, this is an indicator that our predicted y value is too low.

6 0

2 years ago