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3 years ago

What is 7x+5=-9? Show your work.

Mathematics

2 answers:

dexar [7]3 years ago

5 0

7x+5=-9
Subtract 5 on both sides
7x=-14
Divide 7 on both sides
X=-14/7=
-2

vagabundo [1.1K]3 years ago

4 0

We have

$7x+5=-9$ .

1. Subtract 5 from both sides to get

$7x=-9-5\Longrightarrow 7x=-14$ .

2. Divide both sides by 7 to get

$x=\dfrac{-14}{7}=\boxed{-2}$

Hope this helps.

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Write the name of the period that has the digits 913.

sergejj [24]

The name of period that has the digits 913 is hundreds.<span>
Because Period is considered to a group of places of the digits.</span>

In this case, the given number is 913 and it is the group of hundred because 900 is the highest number it contains.

We can also write 913 as

913 = 900 + 10 + 3

It means,

<span>9 hundreds + 10 tens + 3 ones</span>

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2 years ago

The weight of a specific type of male monkey is normally distributed with a mean of 15 pounds and a standard deviation of 3 poun

Viktor [21]

Answer:

1.33

Step-by-step explanation:

The z-score of a value is found by subtracting the mean from the value and then dividing by the standard deviation, this is the formula for the z-score.

z-score = (19-15)/3

z-score = 4/3

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The z-score for the monkey is about 1.33

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3 years ago

PLEASE HELP For the expression below, write two other equivalent expressions using different terms. Make sure one is fully simpl

Julli [10]

Given:

The given expression is

$-4(x+2)-2x+4$

To find:

The two other equivalent expressions.

Solution:

We have,

$-4(x+2)-2x+4$

Using distributive property, we get

$=-4(x)-4(2)-2x+4$

$=-4x-8-2x+4$

So, one equivalent expression is $-4x-8-2x+4$ .

On further simplification, we get

$=(-4x-2x)+(-8+4)$

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Therefore, the second and fully simplified equivalent expression is $6x-4$ .

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2 years ago

I need help asap!!!!

andreev551 [17]

Answer:

Step-by-step explanation:

Because that makes most sense

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3 years ago

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Find the angle between u = (8.- 3) and v = (-3,- 8) Round to the nearest tenth of a degree.

Nimfa-mama [501]

Answer:

Step-by-step explanation:

First you must calculate the module or the magnitude of both vectors

The module of u is:

$|u|=\sqrt{(8)^2 + (-3)^2} \\\\|u|=\sqrt{64 + 9}\\\\|u|=8.544$

The module of v is:

$|v|=\sqrt{(-3)^2 + (-8)^2} \\\\|u|=\sqrt{9 + 64}\\\\|u|=8.544$

Now we calculate the scalar product between both vectors

$u*v = 8*(-3) + (-3)*(-8)\\\\u*v = -24+ 24=0$

Finally we know that the scalar product of two vectors is equal to:

$u*v = |u||v|*cos(\theta)$

Where $\theta$ is the angle between the vectors u and v. Now we solve the equation for $\theta$

$0 = 8.544*8.544*cos(\theta)\\\\0 = cos(\theta)\\\\\theta= arcos(0)\\\\\theta=90\°$

the answer is 90°

Whenever the scalar product of two vectors is equals to zero it means that the angle between them is 90 °

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3 years ago

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