4 years ago

Instead of subtracting 10, you can add________. (Complete the sentence)

Mathematics

1 answer:

Fiesta28 [93]4 years ago

4 0

Instead of subtracting 10, you can add negative 10

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What is the median of the following numbers? 3.31,37,56, 61,57,62

mylen [45]

Answer:

The answer might be 56 because the median is the middle of it

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3 years ago

Read 2 more answers

The ratio of boys to girls in a school is 9:11. If there are 400 pupils in the school,how many boys are there

Anvisha [2.4K]

I believe its 180.

I have seen this question before and the amount of girls was 220, so 400-220 is 180

Hope this helps :)

5 0

3 years ago

Make C the subject of the formula: F=9/5 C + 32

Dafna1 [17]

1)-9/5C=-F+32
2)9/5C=F-32
3)9C=5(F-32)
4)C=5/9(F-32)

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3 years ago

A phone company charges a flat rate of $15 to make phone calls for a month.they charge $0.10 per minute for each call made.if th

Ne4ueva [31]

Answer:

450 minutes

Step-by-step explanation:

15 + 0.1x = 60

15 - 15 + 0.1x = 60 - 15

0.1x = 45

$\frac{0.1x}{0.1} = \frac{45}{0.1}$

x = 450

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3 years ago

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X+ y + z = -3 3y - Z = 4 2x- y - 2z = -5

snow_lady [41]

Answer:

(-3, 1, -1)

Step-by-step explanation:

x + y + z = -3 --> (1)
3y - z = 4 --> (2)
2x - y - 2z = -5 --> (3)

Add up (1) and (2)

x + 3y + y + z - z = -3 + 4 ⇒ x + 4y = 1 --> (4)

Double (2) and subtract from (3)

2x - y - 2z - 2(3y - z) = -5 - 2(4) ⇒ 2x - y - 2z - 6y + 2z = -5 - 8
2x - 7y = -13 --> (5)

Double (4) and subtract (5)

2(x + 4y) - 2x + 7y = 2 + 13 ⇒ 2x + 8y - 2x + 7y = 15 ⇒ 15y = 15 ⇒ y = 1

Finding x

x + 4(1) = 1 ⇒ x = 1 - 4 ⇒ x = -3

Finding z

-3 + 1 + z = -3 ⇒ z = -1

So the answer is:

(-3, 1, -1)

4 0

3 years ago