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4 years ago

13

Please help me with just this one question. 7th grade math

1 answer:

GREYUIT [131]4 years ago

6 0

Answer:

B. y= (2x/3)+4

Step-by-step explanation:

i picked a point and plugged the x and y into the equation to see if it would work

(example: $(8)=\frac{2(6)}{3} +4\\$ )

then i did the same thing with a different point on the graph to make sure it was correct :)

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4 years ago

If $8,000 is invested at 5 % annual interest compounded

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8000 (1.025)^12

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3 years ago

Write the equation of the line in slope-intercept form that has the following points: (2, -1)(5, -3)

kirza4 [7]

Answer:

$\large\boxed{y=-\dfrac{2}{3}x+\dfrac{1}{3}}$

Step-by-step explanation:

The skope-intercept form:

$y=mx+b$

m - slope

b - y-intercept

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (2, -1) and (5, -3). Substitute:

$m=\dfrac{-3-(-1)}{5-2}=\dfrac{-3+1}{3}=\dfrac{-2}{3}=-\dfrac{2}{3}$

We have the equation:

$y=-\dfrac{2}{3}x+b$

Put the coordinates of the point (2 , -1) to the equation:

$-1=-\dfrac{2}{3}(2)+b$

$-1=-\dfrac{4}{3}+b$ <em>add 4/3 to both sides</em>

$\dfrac{1}{3}=b\to b=\dfrac{1}{3}$

Finally we have:

$y=-\dfrac{2}{3}x+\dfrac{1}{3}$

6 0

4 years ago

PLZ ANSWER!!! IF YOU ANSWER U GET 20 POINTS<br> Find |-65|.<br><br> 0<br> 65<br> -65

iogann1982 [59]

65 Bc absolute value of negative is positive

3 0

3 years ago

Read 2 more answers

How do I solve this equation and check the solutions?

IgorLugansk [536]

<h3>SOLUTION :-</h3>

<u>By squaring on both sides :</u>

$: \implies \sf {\big( \sqrt{20 - 8x} \:\big)}^{2} = x^2 \\ \\$

$:\implies \sf {20 - 8x} = {x}^{2} \\ \\$

<u>Solving quadratic equation :</u>

$: \implies\sf{ {x}^{2} + 8x - 20 = 0 } \\ \\$

$: \implies\sf{ {x}^{2} + (10 - 2)x - 20 = 0 } \\ \\$

$: \implies\sf{ {x}^{2} + 10x - 2x - 20 = 0 } \\ \\$

$: \implies\sf{ x(x + 10) - 2(x + 10 )= 0 } \\ \\$

$:\implies\sf{( x + 10 )(x - 2)= 0 } \\ \\$

$: \implies\sf x + 10 = 0 \: or \: x - 2 = 0 \\ \\$

$: \implies\sf x = 0 - 10\: or \: x = 0 + 2\\ \\$

$: \implies \underline{\boxed{ \bf{x = - 10 \: or \: x = 2}}}$

$\huge {\therefore}$ The roots of this equation are -10 and 2.

3 0

3 years ago

Read 2 more answers