MATHEMATICS MIDDLE SCHOOL

Help please. will give brainliest

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

If the average of x and y is 12

(x+y)/2 =12

x+y = 2*12

x+y =24

We want the average of x+y+z

(x+y+z)/3 =

We know x+y =24 and z =6

(24+6)/3

30/3

Answer 2

Answer:

Answer:

Step-by-step explanation:

We know that the average of two numbers are the numbers divided by 2, right?

So the equation would be this

X + Y/2 = 12

x + y = 24, since 24 divided by 2 is 12.

You should add x (6) to 24 and wind up with 30

Now to get the average between those 3, divide by 30 by 3

you should get 10

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If log3 8 ≈1.8928, evaluate log3 72

Answers

Final answer:

To evaluate log3 72, given that log3 8 is approximately 1.8928, we use properties of logarithms. We can express 72 as 8×9, and since log3 9 equals 2, log3 72 is 1.8928 + 2, which is 3.8928.

Explanation:

The student is asking to evaluate log3 72 given that log3 8 ≈1.8928. We can use the properties of logarithms to solve this. Since 72 can be expressed as 8×9, and we know that log3 8, we can find the log3 9 by understanding that 9 is 3²and therefore log3 9 is 2, because the base and the argument are the same.

Now, using the property of logarithms that loga (xy) = loga x + loga y, we can write log3 72 as:

log3 (8 ∙9) = log3 8 + log3 9

log3 72 = 1.8928 + 2

log3 72 = 3.8928

Learn more about Logarithms here:

brainly.com/question/37287488

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Answer:

≈ 3.8928

Step-by-step explanation:

log base 3 of 72 is approximately 3.8928

you would need to plug this into a calculator to solve

Solve for x

−4.5 (x−8.9) =12.6

Answers

-4.5x + 40.05 = 12.6
-4.5x = -27.45
x = 6.1

Combine like terms: -4x - 10x

Answers

Answer:

-2x

Step-by-step explanation:

A rental car company charges a fixed fee of $30 plus $0.05 per mile. Let C represent the total cost of renting a car and driving it M miles

Answers

We know that renting the car will cost $30, regardless of whether you drive it any where or not
So far
C = $30
On the end of this equation, we want to be able to add another value, that can vary depending on the quantity of M (number of miles)
The second value is $0.05 multiplied by how many miles are travelled
Also expressed as $0.05M

Finally, just fix the two parts together

C = $30 + $0.05M

What is the x-intercept for the equation -2x + 5y = -10?(5,0)
(2,0)
(-5,0)
(-2,0)