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2 years ago

-7x – 4y = 11 7x + 4y = 20

Mathematics

1 answer:

Free_Kalibri [48]2 years ago

7 0

9514 1404 393

Answer:

no solution

Step-by-step explanation:

Adding the two equations gives you ...

(-7x -4y) +(7x +4y) = (11) +(20)

0 = 31 . . . . . . false

No values of the variables will make this equation true. There is no solution.

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25% of 68000 is how much

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$1 \% =\frac{1}{100} \\ \\25 \% =\frac{25}{100}=0,25\\ \\25 \% \cdot 68000 = 0,25 \cdot 68000 =17 000$

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2 years ago

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A tepee is designed to have a diameter of 10 ft and a volume of 393 ft. At

Citrus2011 [14]

Answer:

15 ft.

Step-by-step explanation:

The tepee is a cone and its volume

= 1/3 pi r^2 h where r = radius and h = height.

The radius r = 1/2 * 10 = 5 ft.

So we have the equation:

393 = 1/3*3.14* 5^2 * h

h = 393 / (1/3*3.14*25)

= 15.02 ft.

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2 years ago

What is the volume of a rectangular prism with the dimensions: base 3 1 2 cm, height 1 1 2 cm, and length 5 1 2 cm?

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Answer:

The volume of a rectangular prism is $28\frac{7}{8}\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the rectangular prism is equal to

$V=BHL$

Convert the given dimensions to an improper fractions

$B=3\frac{1}{2}\ cm=\frac{3*2+1}{2}=\frac{7}{2}\ cm$

$H=1\frac{1}{2}\ cm=\frac{1*2+1}{2}=\frac{3}{2}\ cm$

$L=5\frac{1}{2}\ cm=\frac{5*2+1}{2}=\frac{11}{2}\ cm$

substitute in the formula

$V=(\frac{7}{2})(\frac{3}{2})(\frac{11}{2})=\frac{231}{8}\ cm^{3}$

Convert to mixed number

$\frac{231}{8}=\frac{224}{8}+\frac{7}{8}=28\frac{7}{8}\ cm^{3}$

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2 years ago

What is 7 × 0.057 equal

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Answer:

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Step-by-step explanation:

3 4

0.057

x 7

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0.399

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PLEASE HELP

faltersainse [42]

Answer: 5x+12.50=62.50

5*12.50=62.50

Step-by-step explanation:

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2 years ago