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saveliy_v [14]
3 years ago
13

The results of a survey indicate 70% of seventh-graders watch at least one movie during the weekend. Based on this survey of a g

roup of 50 seventh-graders, how many will watch at least one movie this weekend?
Mathematics
1 answer:
marusya05 [52]3 years ago
5 0

Answer:

35 students

Step-by-step explanation:

70% of 50 = 0.7×50 = 35

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3 years ago
Seven less than sixteen times a number is equal to the same number reduced by 5. What is the number?
Romashka [77]

Answer:

x = 2/15

Step-by-step explanation:

first, create a formula or expression

16x - 7 = x - 5

move x, subtract it

15x - 7 = -5

add 7

15x = 2

divide by 15

x = 2/15

sub in to check:

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7 0
3 years ago
The fourth term of an Arithmetic Sequence is equal to 3 times the first term, and the seventh term exceeds twice the third term
11Alexandr11 [23.1K]

Answer:

The first term is 3. The common difference is 2.

Step-by-step explanation:

The first term is x.

The common difference is d.

The second term is x + d.

3rd term: x + 2d

4th term: x + 3d

7th term: x + 6d

"The fourth term of an Arithmetic Sequence is equal to 3 times the first term"

x + 3d = 3 * x       Eq. 1

"the seventh term exceeds twice the third term by 1"

x + 6d = 2(x + 2d) + 1       Eq. 2

Simplify Eq. 1:

2x = 3d

Simplify Eq. 2:

x + 6d = 2x + 4d + 1

x = 2d - 1

Multiply both sides of the last equation by 2.

2x = 4d - 2

2x = 3d   (simplified Eq. 1)

Since 2x = 2x, then the right sides are equal.

3d = 4d - 2

d = 2

2x = 3d

2x = 3(2)

2x = 6

x = 3

Answer: The first term is 3. The common difference is 2.

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3 years ago
Find the Roots of the quadratic equation.<br> 2x2 + 7 – 30 = 0
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Answer:

x=−5/2,6

Step-by-step explanation:

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3 years ago
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Answer:

Where is the picture? I can help

Step-by-step explanation:

6 0
3 years ago
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