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Dmitriy789 [7]
3 years ago
5

3

Mathematics
2 answers:
Tamiku [17]3 years ago
6 0
The answer is 972.8 because 12.80*76= $972.8
Ne4ueva [31]3 years ago
5 0

Answer:

$972.8

Step-by-step explanation:

$12.80 x 76 = $972.8

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Amrita is 8 years elder to her brother Aman. If the ratio of their ages is 7 : 3, find their present ages?​
viktelen [127]

Answer:

Amrita = 14 years old

Aman = 6 years old

Step-by-step explanation:

Find out the difference of the units.

7 - 3 = 4

Amrita is 4 units/8 years older than Aman.

4 units = 8

1 unit = 8 ÷ 4 = 2

Amrita is 7 units and her brother is 3 units.

Amrita = 7 units x 2 = 14

Aman = 3 units x 2 = 6

6 0
3 years ago
5. Combien de paires de nombres naturels peut-on former dont : a) la somme est 23? b) la différence est 100?​
Lilit [14]

Answer: a) 24 b) infini

Step-by-step explanation: a) parce que tu peut faire que 24 somme pour faire 23. B) infini car tout plus haut 100 fonctione

3 0
1 year ago
What is the value of x in the equation 1.5(x + 4) – 3 = 4.5(x - 2)?<br> O 3<br> O 4<br> O 5<br> 09
nasty-shy [4]

Answer:

Step-by-step explanation:

1.5x + 6 - 3 = 4.5x - 9

1.5x + 3 = 4.5x - 9

Bringing like terms on one side

3 + 9 = 4.5x - 1. 5x

12 = 3x

12/3 = x

4 = x

3 0
3 years ago
Read 2 more answers
an athlete is running on a bike path with mile markers he is currently at mile marker 13 if his sister is 5 miles away determine
anzhelika [568]
I have absolutely no clue how mile markers work, but assuming they mark a single mile each, his sister will either be five miles in front, or five miles behind him.

The possible answers are mile markers 8 and 18.
3 0
3 years ago
Read 2 more answers
The length of triangle base is 36. The line which is parallel to the base divides the triangle into two equal area parts. Find a
Soloha48 [4]

Answer:

18\sqrt{2}

Step-by-step explanation:

Consider triangle ABC with the base AC=36. Let the line DE be parallel to the line AC. If DE||AC, then triangles ABC and DBE are similar. If k is the scale factor of these triangles, then

\dfrac{DE}{AC}=\dfrac{BG}{BF}=k.

Thus,

DE=k\cdot AC=36k,\\ \\BG=k\cdot BF.

The area of the triangle ABC is

A_{ABC}=\dfrac{1}{2}AC\cdot BF=\dfrac{1}{2}\cdot 36\cdot BF=18BF.

The area of the triangle DBE is

A_{DBE}=\dfrac{1}{2}DE\cdot BG=\dfrac{1}{2}\cdot 36k\cdot kBF=18k^2BF.

Since line DE divides triangle ABC in two equal area parts, we have that

A_{DBE}=\dfrac{1}{2}A_{ABC},\\ \\18k^2BF=\dfrac{1}{2}\cdot 18BF,\\ \\k^2=\dfrac{1}{2},\\ \\k=\dfrac{1}{\sqrt{2}}

and

DE=\dfrac{1}{\sqrt{2}}\cdot 36=18\sqrt{2}.

4 0
3 years ago
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