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4 years ago

The square of a number added to 3 times the number is 28

Mathematics

2 answers:

Gre4nikov [31]4 years ago

7 0

3x28=84

Step-by-step explanation:

Naddika [18.5K]4 years ago

7 0

Answer: the number is 5

Step-by-step explanation:

Let the number be $x$ , then the square of the number means $x^{2}$ .

Therefore:

$x^{2} +3=28$

subtract 3 from both sides

$x^{2} = 28 - 3$

$x^{2} =25$

find the square root of both sides

$x = 5$

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Find the slope of the line graphed in the diagram and choose the correct answer from the choices below. The two intercepts are (

kolezko [41]

1.2 is the slope of the line graphed in the given diagram

<u>Step-by-step explanation:</u>

We can use the given points (0, 3) and (-2.5, 0) to solve.

Slope formula is given by

$\text { slope, } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

Given two intercepts:

$\left(x_{1}, y_{1}\right)=(0,3) \text { and }\left(x_{2}, y_{2}\right)=(-2.5,0)$

By substituting these in the slope equation, we get

$\text { slope, } m=\frac{0-3}{-2.5-0}=\frac{-3}{-2.5}=\frac{3}{2.5}=1.2$

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4 years ago

What is the equation of the graphed line written in standard form?

liraira [26]

Answer:

The last one 5x-3y=15 This is the same as y= (5/3)x -5

Step-by-step explanation:

5x-3y=15

Move 5x to the right (becoming negative)

-3y = -5x +15

Divide everything by - 3

y= (5/3)x -5

y intersect= -5 ( line crosses y coordinate at -5)

Slope = 5/3 From -5 you start counting (5 up,3 right,5 up,3 right.... OR 5 down,3 left,5 down,3 left........)

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3 years ago

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professor190 [17]

Answer:

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Step-by-step explanation:

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