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3 years ago

I'm having trouble solving this I don't know the steps

Mathematics

1 answer:

Andreas93 [3]3 years ago

8 0

Answer:

x=4

Step-by-step explanation:

21x+6+90=180

First, we need to subtract the numbers.

21x=180-90-6

21x=84

Now, we need to find the value for 1x, so divide the whole equation by 21

84/21

21/21

x=4

Hope this helps!

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Graph the solution set to the inequality.

Mariana [72]

Answer:

A is the answer!

Step-by-step explanation:

Trust me, I'm taking this test and got the answer wrong. But! At least I got the answer revealed for ya T-T)

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3 years ago

The scatter plot shows how much puppy weighs within a certain time period. about how much did the puppy gain during this time pe

GREYUIT [131]

Where is the picture to answer it?

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3 years ago

Glenna wants to rent a car for a trip to key west for one weekshe calls two car rental companies to get prices. mr kotters renta

Semmy [17]

Answer:

B rentals is better deal for journey 432 miles

If she spending same money either company the distance travels in a week is $x=600$ miles

Step-by-step explanation:

Given,

Mr K rentals cars $=\$ 99$ per week and $\$ .11$ for over 100 miles

B rentals car $=\$ 75$ per week and $\$ .15$ for over 150 miles

Let total journey cost of Glenna if she travels 432 miles

For Mr, K rentals is Y

Y=99+.11\times \left ( 432-100\right )

$Y=99+.11\times \left ( 432-100\right )$

$Y=99+36.52$

$Y=\$ 135.52$

For B rental journey cost is Z

$Z=75+.15\left ( 432-150 \right )$

$Z=75+42.3$

$Z=\$ 117.3$

If she spending same money either company

x mile she drive in a week

$Y=Z$

$99+.11\left ( 432-100 \right )x=75+.15\left ( 432-150 \right )x$

$99-75=.15x-.11x$

$24=.04x$

$x=24/.04$

$x=600$

7 0

3 years ago

Can someone help me please? justify your answer also plz!

Afina-wow [57]

Answer:

a. True

b. False

c. True

Step-by-step explanation:

a.

12 ÷ $\frac{36}{7}$ is equal to $\frac{7}{3}$

Personally, I hate fractions so I make these into decimals by dividing the numerator by the denominator, but I'll do both to show you.

Decimal:

$\frac{36}{7}$

In your calculator, type 12

Then the division sign.

Then make parenthesis

in the parenthesis you will have (36/7)

End parenthesis

Press the equal sign and you should get a grand total of 2.333 repeating

To see if its equal to $\frac{7}{3}$ , you put 7 divided by 3 in your calculator next

If you do, you should get 2.333 repeating.

This shows they are equal.

Fraction:

Keep, switch, flip

The first step will be to make your whole number into a fraction.

$\frac{12}{1}$ ÷ $\frac{36}{7}$

The first thing we use is keep

The first number in this equation is that $\frac{12}{1}$

We're going to leave it as it is.

Next we have to use switch. To do this we make the ÷ into a ×

So your problem should look as so:

$\frac{12}{1} * \frac{36}{7}$

Lastly, we have flip.

The last number in our equation is $\frac{36}{7}$

We are going to use the reciprocal of it which would be $\frac{7}{36}$

So your problem should now look like this:

$\frac{12}{1} * \frac{7}{36}$

At this point, we can now cross multiply

So from the numerator 12 to the denominator 36, if we divided 36 by 12 its 3.

But the denominator 1 and the numerator 7 are already divided as much as they can be.

So now your expression should be: $\frac{1}{1} * \frac{7}{3}$

This is because of that cross multiplication we did.

12 goes into 36, 3 times so 3 would substitute 36 while 1 would substitute 12

So now its just basic multiplication

$\frac{1*7}{1*3} = \frac{7}{3}$

So we can conclude that $12 * \frac{36}{7}$ does in fact equal $\frac{7}{3}$

b.

Multiplying a number by $\frac{1}{2}$ is the same as dividing by 2

This is false

When you multiply by 2, you are doubling the original number

When you multiply by $\frac{1}{2}$ , you are cutting the number in half

Ex:

18 * 2 = 36

18 * $\frac{1}{2}$ = 9

If it was dividing instead of multiplying, this would be true but since $\frac{1}{2}$ halves the number whether you multiply or divide it would not be true.

c.

$\frac{3}{2}$ of a number is less than this number

Basically, what this is saying is if you divide by $\frac{3}{2}$ , would it give you less than the original number.

The answer would be true

It would be division first of all because your looking for $\frac{3}{2}$ of a number.

Secondly, if you divide by a fraction or decimal, the number tends to be smaller than the number you started with.

Ex:

6 ÷ $\frac{3}{2}$ = 4 or 6 ÷ 1.5 = 4

Ex2:

682 ÷ $\frac{3}{2}$ = 454.6 repeating or 682 ÷ 1.5 = 454.6 repeating

I hope this helps! Don't be afraid to reach out with any further questions!

4 0

3 years ago

Otto spent 3/4 of the money he had saved on a new video game. If the video game cost $48, how much money did he have before he b

quester [9]

Answer: $64

Step-by-step explanation:

Given: The part of money he spent =3/4

Let the total money Otto has be 'x'.

Then according to the question, we have

$\frac{3}{4}x=48$

Multiply 4 on both the sides, we get

$3x=48\times4$

Divide 3 on both the sides, we get

$x=\frac{48\times4}{3}\\\\\Rightarrow\ x=64$

Hence, the money he had before he bought the game = $64

5 0

3 years ago

Read 2 more answers