How can you use mental math to multiply numbers by 10?

Answer:

x^2 + 9x + 4 + 9/x - 4

Step-by-step explanation:

Simplify

Answer:

He had 78$ at the end of the day

Step-by-step explanation:

Adding up all the expenses he made then adding them to 51.50,

51.50 + 10.50 + 10.50 + 1.75 + 3.75

Answer:

4m - 64

Step-by-step explanation:

Solve 4(m - 16)

4(m - 16) = 4 x m - 16 x 4

= 4m - 64

Answer:

5/15

Step-by-step explanation:

17/15-x/15=12/15

x=5

if my answer helps please mark as brainliest.

Answer:

5/15

Step-by-step explanation:

17/15-x/15=12/15

x=5

Step-by-step explanation:

if you have 3/4 you divide the part, 3, by the whole, 4

3 ÷ 4 = 0.75

then multiply 0.75 by 100, 75, then add a percentage sign: 75%

Answer:

Step-by-step explanation:

m∠FGH = 360° - 101° - 2×90° = 79°

Answer:

55

Step-by-step explanation:

6m+90=96m

Answer:

D Is the answer

Answer:

The Answer is gonna be 0.2

0.1504 =0.2

Answer:

$7 per flower

Step-by-step explanation:

So to find the unit rate we divide the money by how many flowers sold:

70 ÷ 10 = 7

hope this helps:)

Answer:

mk lets dk this. also remember don't get stressed over stuff like this! you got it!

Step-by-step explanation:

1) 5

2) 3

3) 6

4) 5

5) 9

6) 8

7) 3

because there were so many I didn't include the work but if you need work for one of them I can give you!

1. x = 5

2. y = 3

3. x = 6

4. y = 5

5. y = 9

6. w = 8

7. x = 3

Answer:

196 m^2

Step-by-step explanation:

Length of the side of the square = 14 m

area= 14×14 = 196 m^2

hope it helps...

have a great day!!

Answer:

D

Step-by-step explanation:

I looked first at what added together equals 9. then I did the equation 0.25x+1.15y=4.95. I put the numbers into the equation and got my answer

Answer:

i see how you feel but ._. i just aint good at math shawty

Step-by-step explanation:

Explanation: The power rule tells us that when we have a power taken to another power, we keep the base the same and we multiply the exponents.

So we have p¹⁰ which is our final answer.

Answer:

h=12

Step-by-step explanation:

First look at the formula for finding the volume of a cone- [tex]V=\pi r^{2} \frac{h}{3}[/tex]

Next substitute any variables for values you already know- [tex]144\pi =\pi (6)^{2} \frac{h}{3}[/tex]

Then solve the equation.

Answer:

[tex]g(f(5)) = 44[/tex]

Step-by-step explanation:

First, solve for [tex]f(5)[/tex]

[tex]f(5) = 5^2-6(5)-6 = -11\\[/tex]

Then, plug in what you got for [tex]f(5)[/tex] into [tex]g(x)[/tex].  Since [tex]f(5) = -11[/tex] you will be solving for [tex]g(-11)[/tex].

[tex]g(-11) = -3(-11) + 11 = 44[/tex]

the answer is 44.

Please be sure to mark this answer as brainliest if it satisfies you.

Step-by-step explanation:

your answer is in the photo attached

it is either the second one or the last one

Answer:

For (a) the answer is 450, 50(9)=450 total blocks.

Step-by-step explanation:

For (c), you will have to use a scale of 1 to 5, so, 450(5)=2,250.

For (b), if the map is 21 square inches and you want to enlarge it to the size you want, you would have to take the total value of the original map and multiply it by whatever factor it has to be multiplied by.

Now finally for (d), I applied proportional reasoning by looking at the dimensions and adding them all together to get the area value, then comparing the area value to the enlarged figure or decreased figure.

(I did this quite a long while ago, I'm going based on my memory and math skills, sorry if I failed horrendously.)

Answer:

m=7

Step-by-step explanation:

Replace all occurrences of  +  −  with a single -. A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because 1⋅ − 1 = − 1

7(m-13)=-42

Divide each term by  7  and simplify.

m-13=-6

Move all terms not containing  m  to the right side of the equation.

m=7

Hope this helps!

Plz mark brainiest! =D

Answer:

$10.5 per dozen.

Step-by-step explanation:

$3.50 x 3 = $10.5

4 = 3.50 4 x 3 = 12 = $10.5

Answer: 7.2

Step-by-step explanation:

distance = sqrt (1−(−3))^2+(−2−4)^2

distance = sqrt 52

Hope this helps!

Answer:

-224t

This is all you had to do and hear is the annswer

Answer:

m∠B = 49.4°

Step-by-step explanation:

Use the law of cosines to get side c, and then the law of sines to get angle B

[tex]c^{2} = a^{2} + b^{2} - 2ab cos C\\ = 4^{2} + 5.8^{2} - 2(4)(5.8) cos 99\\ = 16 + 33.64 + 7.25855\\ = 56.25855\\c = \sqrt{56.25855} = 7.543[/tex]

sin C/c = sin B/b

sin 99/7.543 = sin B/5.8

sin B = 5.8 sin 99/7.543

        =  .75945

m∠B = arcsin .75945 = 49.4°

Answer:

x=-5 or -5

Step-by-step explanation:

x - 4 = 2x + 1

Subtract x from both sides canceling out the x on the left, getting...

-4 = x + 1

Then subtract the 1 from both sides canceling out the 1 on the right, getting...

-5 = x

Subtracting x from 2x gets you 1x which you just write as x because there is only one x. Doing the equation from the other side will still get you the same answer and I will show you.

x - 4 = 2x + 1

-x - 4 = 1

-x = 5

x = -5

Hope this helps!

Answer and Step-by-step explanation:

We need to solve for m, and we do that by adding together the measure of angles SWT and TWV, and then equal them to 90.

36 + 6m + 6 = 90

Add 36 to 6.

42 + 6m = 90

Now, subtract 42 from both sides.

6m = 48

Now, divide each side by 6 to get m.

m = 8

So, we get the value of m to be 8.

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