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bija089 [108]
3 years ago
5

devante is 26 years younger than Ariana. 2 years ago Arianas age was 2 times devantes age. how old is devante now

Mathematics
1 answer:
lesantik [10]3 years ago
8 0
A= d+26
a-2= 2(d-2)

Substitute for a
d+26-2= 2d-4

Combine like terms
d+24=2d-4

Subtract d from both sides
24=d-4

Add 4 to both sides
d=28

Final answer: 28
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What is 5/8 as a percent and a decimal
Makovka662 [10]

To write a fraction as a percent, first remember that a percent is a ratio of a number to 100. If we want to write 5/8 as a percent, we need to find a fraction equivalent to 5/8 that has a 100 in the denominator. We can do this by setting up a proportion.

\frac{5}{8} = \frac{n}{100}

<h3 /><h3>8n = 500</h3><h3>÷8     ÷8</h3><h3>    n = 62.5%</h3><h3>Therefore, 5/8 is equal to 62.5%.</h3><h3 />

To write a fraction as a decimal, we can simply divide the numerator by the denominator.

5 ÷ 8 = 0.625

Therefore, 5/8 is equal to 0.625.

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6 0
3 years ago
A computer software retailer used a mark up of 150%. Find the cost of the computer
cluponka [151]

The selling price of the computer is $35.

4 0
2 years ago
A cube whose edge is 20 cm 1 point
Sav [38]

Answer:

Unpainted  surface area = 514.28 cm²

Step-by-step explanation:

Given:

Side of cube = 20 Cm

Radius of circle = 20 / 2 = 10 Cm

Find:

Unpainted  surface area

Computation:

Unpainted  surface area = Surface area of cube - 6(Area of circle)

Unpainted  surface area = 6a² - 6[πr²]

Unpainted  surface area = 6[a² - πr²]

Unpainted  surface area = 6[20² - π10²]

Unpainted  surface area = 6[400 - 314.285714]

Unpainted  surface area = 514.28 cm²

6 0
3 years ago
Select the correct answer from each drop-down menu.
erik [133]

Answer:

Grades 6 and 8

Step-by-step explanation:

If the relationship of girls to boys in two different grades are proportional, <u>they must have the same ratio</u>. To tackle this problem, we can find the <u>ratios</u> of genders in each grade and compare them.

Step 1, finding ratios:

Finding ratios is just like <u>simplifying fractions</u>. We will reduce the numbers by their<u> greatest common factors</u>.

  • GRADE 6:

9:12=\\3:4

  • GRADE 7:

12:18=\\2:3

  • GRADE 8:

15:20=\\3:4

  • GRADE 9:

25:36

<u>Can't be simplified!</u>

<u />

Step 2:

Notice how grades 6 and 8 both had a ratio of 3:4. We can conclude that these two grades have a proportional relationship between girls and boys.

<em>I hope this helps! Let me know if you have any questions :)</em>

<u />

8 0
2 years ago
2. Write 7x2 - 4 + 6x3 - 4x - x4 in standard form.
Hunter-Best [27]

Answer:

16-5x

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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