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igor_vitrenko [27]
3 years ago
12

A quarter of the sum of a number and 20 is equivalent to 30. Find the number.

Mathematics
1 answer:
Alisiya [41]3 years ago
4 0

Answer:

X = 100

Step-by-step explanation:

X + 20 over 4 = 30

1/4x + 5 = 30

-5               -5

1/4x = 25

multiply both sides by 4

x = 100

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Step-by-step explanation:

6 0
2 years ago
Write an equation for the nth term of the arithmetic sequence. Then find a50.<br> 8, 2, -4, - 10,
AlexFokin [52]
Answer: See below

Explanation:

Write an equation for nth term:

a + d(n - 1)

a = 8 (first term)
d = -6 (common difference)

8 - 6(n - 1)
= 8 - 6n + 6
= -6n + 14

Find a 50:

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6 0
3 years ago
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yarga [219]
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7 0
2 years ago
A prism whose base is a 9-sided polygon is intersected by a plane. In which case could the cross section be a 10-sided polygon?
Vikki [24]
The <u>correct answer</u> is:

D) <span>when the plane makes a narrow angle with the base.

Explanation:

If a cross section of a prism is taken <u>parallel</u> to the base, the cross section will be the <u>same shape</u> as the base.  In this case, it will be a 9 sided polygon.

If a cross section of a prism is taken <u>perpendicular</u> to the base, the cross section will be a <u>rectangle</u>, no matter how many edges the cross section goes through.

The only way to get a cross section with more sides than the original figure is to take a slant cross section, or one with an angle other than 90</span>° or 180° to the base.  This makes D our only option.
5 0
3 years ago
Read 2 more answers
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Naily [24]

Answer:

This is false.

Step-by-step explanation:

Adding a negative integer is the same as subtracting a positive integer.

4 0
2 years ago
Read 2 more answers
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