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3 years ago

Homework (5)

Mathematics

1 answer:

adelina 88 [10]3 years ago

7 0

Answer:

Step-by-step explanation:

Let's set the ratio as

7x : 9x

If you add all the states that border an ocean and do not, you will get 48 states (because Alaska and Hawaii are not part of the continental US, as they do not touch the "main" part of the country)

So, we can write this equation.

7x + 9x = 48

Simplify.

16x = 48

Divide both sides by 16.

x = 4

Now, find how many states border an ocean. In our ratio, the number of states that border an ocean was 7x. Substitute x = 4 into 7x

7 * x = 7 * 4 = 28

The number of states that border an ocean is 28.

I hope this helps! Feel free to ask any questions!

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Find f(-3), f(-1), and f(1)

suter [353]

Answer:

I will just show you how to substitute.

Step-by-step explanation:

all you have to do is just plug f(x) into the number you want. So if you see any x's, all you gotta do is plug that number after f for x.

So an example of an equation for one of your number is:

$f\left(x\right)=x^2+x$

you then want to plug the number after f for the x's. (I'm doing f(-3).

$f\left(-3\right)=\left(-3\right)^2-3$

You then should get the equation above.

after that you solve.

$f\left(-3\right)=9-3$

$f\left(-3\right)=6$

just follow these steps and you should be fine :))

3 0

4 years ago

If x^2+2=3^2/3+3^-2/3 then prove that 3x^3+9x-8=0

Mama L [17]

here it is

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5 0

4 years ago

(06.02) Translate the algebraic expression shown below into a verbal expression. (3 points) Fraction with variable x in numerato

lukranit [14]

The given expression is x/10

Sum is addition.

Product is multiplication.

Difference is subtraction.

The answer would be: The quotient of some number and ten.

3 0

3 years ago

The equation of a line is y = 1.5x − 2. What are its slope and y-intercept?

DiKsa [7]

You need to use y=mx+c to answer this so basically

gradient/slope (m) is 1.5 and the y-intercept (c) is -2

Hope this helps :)

3 0

2 years ago

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PLEASE HELP WILL MARK BRAINLIEST!

nlexa [21]

Answer:

He did the equation backward. He did $\frac{x_2-x_1}{f(x_2)-f(x_1)}$ , which is wrong.

The actual equation for average rate of change is:

$\frac{f(x_2)-f(x_1)}{x_2-x_1} =$

$=\frac{18-8}{10-6}$

$=\frac{10}{4}$

$=\frac{5}{2}$

6 0

3 years ago

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