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2 years ago

Add 3 to a number, multiply by 7 and result is 63 . Find the number

Mathematics

2 answers:

Evgesh-ka [11]2 years ago

8 0

Answer: 6

Step-by-step explanation:

You can set the unknown number as x and then you would add 3 to x and multiply that by 7.

The equation would be 7(x+3)=63

7(x+3)=63

7x+21=63

7x=42

x=6

The answer is 6

Gre4nikov [31]2 years ago

4 0

Answer:

Step-by-step explanation:

3+6=9 9x7=63

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olganol [36]

Answer: OPTION C (119π cm²)

Step-by-step explanation:

Yon can use the following formula for calculate the surface area of a cone:

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Based on the figure shown attached, you have that:

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Therefore, when you susbtitute these values into the formula shown above, you obtain that the surface area of the cone is:

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polet [3.4K]

Answer:

see explanation

Step-by-step explanation:

The reciprocal of a number n is $\frac{1}{n}$

(a)

1 $\frac{6}{7}$ ← change to an improper fraction

= $\frac{13}{7}$

Then its reciprocal is $\frac{1}{\frac{13}{7} }$ = $\frac{7}{13}$

(b)

The reciprocal of $\frac{7}{13}$ is $\frac{1}{\frac{7}{13} }$ = $\frac{13}{7}$ = 1 $\frac{6}{7}$

(c)

Each is the reciprocal of the other

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2 years ago

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kondaur [170]

Answer:

Step-by-step explanation:

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Step-by-step explanation:

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