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KonstantinChe [14]
3 years ago
12

Joe is 5 years older than sally. in 15 years joe will be 3 times as old as sally is now. how old is sally now

Mathematics
1 answer:
Harrizon [31]3 years ago
6 0
Right now sally is 10 years old. Hope this helps!
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Solve for each expression by writing the solution in unit form and in standard form.
Sonja [21]

Answer:

<em>Unit Form:</em>

  • <em>3 hundreds, 0 tens, 0 ones</em>
  • <em>5 thousands, 0 hundreds, 0 tens, 0 ones</em>
  • <em>9 thousands, 0 hundreds, 0 tens, 0 ones</em>
  • <em>7 ten thousands, 0 thousands, 0 hundreds, 0 tens, 0 ones</em>

<em>Standard Form:</em>

  • <em>300</em>
  • <em>5,000</em>
  • <em>9,000</em>
  • <em>70,000</em>

Step-by-step explanation:

Here is how to write solutions to expressions in unit form:

Its important to note that unit form expands a standard form number into ones, tens, hundreds, and so on.

Take your first expression for example.

10 × 3 tens

Re-write this expression so that all terms are in standard form. The second term is <em>3 tens,</em> which can be represented as thirty.

10 × 3 tens

10 × 30

Solve this expression. Multiply ten by thirty.

10 × 30

300

The expression is now represented in its simplest form. We can start to write it in unit form. Break up three hundred into its hundreds, tens, and ones.

300

3 hundreds, 00

3 hundreds, 0 tens, 0

3 hundreds, 0 tens, 0 ones

This shows that the solution to the first expression written in unit form is <em>3 hundreds, 0 tens, 0 ones.</em>

We can continue to solve the following expressions in the same manner. Just in case you still need some help. Here is how you find the remaining three solutions in unit form.

<em>Problem Two</em>

5 hundreds × 10

500 × 10

5,000

<em>5 thousands, 0 hundreds, 0 tens, 0 ones</em>

<em>Problem Three</em>

9 ten thousands ÷ 10

90,000 ÷ 10

9,000

<em>9 thousands, 0 hundreds, 0 tens, 0 ones</em>

<em>Problem Four</em>

10 × 7 thousands

10 × 7,000

70,000

<em>7 ten thousands, 0 thousands, 0 hundreds, 0 tens, 0 ones</em>

Here's how to solve the second part of the problem:

This portion says we need to write the solution in standard form. It is important to remember that a number written in standard form will looks like an ordinary number, i.e. 76, 902, 474.

This means that under the category titled '<em>standard form'</em> we must write the answer as the ordinary solution.

8 0
3 years ago
14 is 20% of what number <br><br> What percent of 48 is 30<br><br> Find 10% of 95<br><br> thanks
Cerrena [4.2K]
14 is 20% of 70

30 is 58% of 48

9-10 is 10% of 95
3 0
3 years ago
The question is in the photo. it is asking for 2 answers
Alex777 [14]

9514 1404 393

Answer:

  • 2nd force: 99.91 lb
  • resultant: 213.97 lb

Step-by-step explanation:

In the parallelogram shown, angle B is the supplement of angle DAB:

  ∠B = 180° -77°37' = 102°23'

Angle ACB is the difference of angles 77°37' and 27°8', so is 50°29'.

Now, we know the angles and one side of triangle ABC. We can use the law of sines to solve for the other two sides.

  BC/sin(A) = AB/sin(C)

  AD = BC = AB·sin(A)/sin(C) = (169 lb)sin(27°8')/sin(50°29') ≈ 99.91 lb

 AC = AB·sin(B)/sin(C) = (169 lb)sin(102°23')/sin(50°29') ≈ 213.97 lb

7 0
3 years ago
The sum of eight and twice a number is 42
saveliy_v [14]

Answer:

8 + 2n = 42

Step-by-step explanation:

the sum of eight:   ___+ 8

and twice(2) a number(could be any variable but for now i choose n):   <u>2n</u> + 8

is 42 (literally mean it equals 42):    <u>2n</u> + 8 = 42

4 0
3 years ago
Helllpppp!!!!!it is a log equation
Vaselesa [24]

I hope this is right

2log2log6(2)+3log6(t)+1/2xlog6(y)

6 0
2 years ago
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