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Lostsunrise [7]
2 years ago
7

Evaluate the expression when x=-2 and y=3. -y+8x 0 Х 5 ?

Mathematics
1 answer:
FromTheMoon [43]2 years ago
8 0

Answer:

Step-by-step explanation:

First here is the problem

-y + 8x

nwo that u have the problem substitute the variables with numbers...see example

-3  +  (8) (-2)

Then Order of operations do the multiplication...so see example below

-3 + (16)   Its negative -16 because a positive and negative when multiplied is          negative

Now -3 + 16 = 13

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Diego's mother is twice as old as he is she is also as old as the sum of the ages of diego and both of his younger twin brothers
OLEGan [10]
2d = d + 11 + 11 = d + 22
d = 22
Diego is 22 years old.
7 0
3 years ago
Frank’s quarter grades are 82.5, 94.7, and 87.9. What grade, rounded to the nearest percent, will Frank have to earn in the last
yanalaym [24]
He would have to atleast get a A:89% because 82.5+94.7+87.9+89=354.1/4=88.525=89% (rounded to the nearest percent) to find this just take 82.5+94.7+87.9+x=xx/4=atleast 89% mainly it just is guess and check to find this. Hope this helps!=)
5 0
2 years ago
a waiter earns $128 for 6 hours of work.The total included $86 in tips.How much does the waiter earn each hour
marta [7]
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$128 - $86= $42

Then divide the 42 by 6:

42 / 6 = 7

So the waiter earns $7 per hour.

Hope this helps!
6 0
3 years ago
If f(x)=X-3/x and g(x) = 5x – 4, what is the domain of (fog)(x)?<br><br><br> NEED HELP FAST!!
dedylja [7]

Answer:

Step-by-step explanation:

This is function composition. We will take the g function and plug it into the f function wherever we see an x. That will look like this when it's done but before it's simplified:

f(g(x))=\frac{5x-4-3}{5x-4} and that can be simplified down to

f(g(x))=\frac{5x-7}{5x-4}

The domain of this function will be all real numbers EXCEPT for the one(s) that cause the denominator to become undefined. Set the denominator equal to 0 and solve for x:

5x - 4 = 0 so

5x = 4 and

x = 4/5

In other words, D = {x | x ≠ 4/5}

6 0
3 years ago
2. Find the area and circumference of the circle to the right.<br>16.6 m<br>​
adoni [48]

Answer:

AREA:

A=216.42m^2

CIRCUMFERENCE:

C=52.15m

Step-by-step explanation:

The formula that is used to calculate the area of a circle is:

A=\pi r^2

Where "r" is the radius of the circle.

The formula for calculate the circumference of a circle is:

C=2\pi r

Where "r" is the radius of the circle.

Then, you need to find the radius. This is:

r=\frac{16.6m}{2}=8.3m

Substituting the radius, you get that the area and the circumference are:

AREA:

A=\pi (8.3m)^2=216.42m^2

CIRCUMFERENCE:

 C=2\pi (8.3m)=52.15m

7 0
3 years ago
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