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3 years ago

9

Can someone please help me answer this expression because i forgot the steps on how to solve this, it would really mean a lot if

someone were to help me.
5(-6)+(-7)

1 answer:

vagabundo [1.1K]3 years ago

6 0

It would be -37 because you would first multiply 5(-6) which would be -30 and then you would add -7

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What is the perimeter?

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43

Step-by-step explanation:

add up each side

14 + 14 = 28

28 + 6 = 34

34 + 9 = 43

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Select the equation that represents a line with a slope of 2 and that contains the point (1, -5).

kondor19780726 [428]

To get the equation of a line, you can use the following:

y - y1 = m (x - x1)

Where:

m is the slope (2)
y1 is the y coordinate of a point (1, -5)
x1 is the x coordinate of the same point (1, -5)

Just substitute in the values:

y - y1 = m (x - x1)

y - (-5) = 2(x - 1) <em>( - - 5 = + 5 )</em>

y + 5 = 2(x - 1)

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Answer:

B. y + 5 = 2(x - 1)

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Step-by-step explanation:

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2. True/False: Adding a positive constant to each value in a quantitative data set does not affect measures of

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False

Step-by-step explanation:

When a constant is added to every data value in a data set?

If you add a constant to every value, the mean and median increase by the same constant. For example, suppose you have a set of scores with a mean equal to 5 and a median equal to 6. If you add 10 to every score, the new mean will be 5 + 10 = 15; and the new median will be 6 + 10 = 16.

<em><u>BRAINLIEST?</u></em>

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3 years ago

Read 2 more answers

Just answer these 4questions! (: 13 points!

Lelechka [254]

Answer:

Step-by-step explanation:

1) GCF = Greatest common factor which would be 6x so lets get started.

$6x^3+36x+48=0\\6x(x^2+6x+8)=0\\x^2+6x+8=0\\$

now we solve this with by quadratic formula.

$x= -\frac{b+-\sqrt{b^2-4ac} }{2a}$

so a=1 , b=6, c =8

and we get two values of x which is

$x=-2 \\and \\x=-4$

but in the question it says we will end up with 3 solutions. Our third solution is actually $x=0$

because we took 6x common as the greatest common factor so

$6x=0\\x=0$

so now we have 3 solutions

$x=-4\\x=-2\\x=0$

2) (x-9)(4x+1)=0

since this equation is already in root form we equate each root to 0

$(x-9)(4x+1)=0\\x-9=0\\x=9 \\4x+1=0\\4x=-1\\x=-1/4$

so our solutions are x=9 and x=-1/4

3)

$(x+5)^2-12=132\\(x+5)^2=132+12\\(x+5)^2=144\\$

now since we need to solve using square roots we apply square roots on both sides

$\sqrt{(x+5)^2}=\sqrt{144}\\x+5=+12 \\x+5=-12$

since when we take the square root of a number we get positive and negative of that number example here

x+5=±12

so

x+5=12 and x+5=-12

x=7 and x=-17

4) Difference of two squares means we just need to factorize it in root form so lets begin,

$4x^2-49$

now if we see this expression can be written like this as well

$(2x)^2-(7)^2$

and if we expand this into the difference formula which is

$(a-b)(a+b)\\$

we get

$4x^2-49=(2x-7)(2x+7)\\$

where a is 2x and b is 7

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3 years ago