3 more than one-half of a number is 10. What is the number?

Mathematics

2 answers:

melisa1 [442]3 years ago

8 0

Answer:

Step-by-step explanation:

You solve this problem by subtracting 3 from 10 because you have to solve it inversely. After doing this you get 7. Since that is 1/2 a number the number is 14

Pani-rosa [81]3 years ago

3 0

Answer:

Step-by-step explanation:

Let's call the number x.

$\dfrac{x}{2}+3=10$

Subtract 3 from both sides:

$\dfrac{x}{2}=7$

Multiply both sides by 2:

$x=14$

Hope this helps!

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A cone and a triangular pyramid have a height of 9.3 m

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Step-by-step explanation:

<u><em>The complete question is</em></u>

A cone and a triangular pyramid have a height of 9.3 m and their cross-sectional areas are equal at every level parallel to their respective bases. The radius of the base of the cone is 3 in and the other leg (not x) of the triangle base of the triangular pyramid is 3.3 in

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The picture of the question in the attached figure

we know that

If their cross-sectional areas are equal at every level parallel to their respective bases and the height is the same, then their volumes are equal

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$\frac{1}{3}\pi r^{2}H=\frac{1}{3}[\frac{1}{2}(b)(h)H]$