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frez [133]
3 years ago
15

The ratio of boys and girls at the beach cleanup was 7:8. If there were 42 boys, how much girls were there

Mathematics
1 answer:
ratelena [41]3 years ago
3 0

Answer:

48 girls

Step-by-step explanation:

Divide 42 by 7 and then multiply the answer by 8.  So 42/7 is 6 and 6 multiplied by 8 is 48 so if there are 42 boys there are 48 girls.

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1/2(a+b)-(a-b)exponent2 when a=18 and b=14
lora16 [44]

Answer:

0

Step-by-step explanation:

Substitute the given values for a and b into the expression

\frac{1}{2}(18 + 14) - (18 - 14)²

= \frac{1}{2} × 32 - 4²

= 16 - 16

= 0

8 0
3 years ago
Peter is making an "X marks the spot" flag for a treasure hunt. The flag is made of a square white flag with sides of 12 centime
zheka24 [161]

Answer:

34 cm

Step-by-step explanation:

The actual question is How many inches of ribbon Peter will need to make the "X".

Using the Pythagorean theorem, the length of the diagonal of a square with 12 cm sides is:

d^2=12^2+12^2\\d=\sqrt{288}\\ d=16.97\ cm

Since the "X" requires two diagonals, the length of ribbon required is:

L=2*16.97\\L=34\ cm

The length required, rounded to the nearest centimeter, is 34 cm.

6 0
3 years ago
A pair of shorts are £15 in a 40%. What was the non-sale price
lana66690 [7]

Answer:

£10.71

Step-by-step explanation:

Given the original price including discount od shorts = £15

Percent discount = 40%

Original price = x

Using the expression to calculate x

x + (40%of x) = 15

x +0.4x = 15

1.4x = 15

x = 15/1.4

x = £10.71

Hence the non sale price is £10.71

4 0
3 years ago
Which real-world story is represented by the addition problem (–2) + (–3) = –5?
tangare [24]

The answer is A.

If the submarine descended then it went below, and if it ascended it went above. Therefore:

"Descended 2 miles"= -2

"Then descended another 3 miles"= -3

(-2)+(-3)=-5

Adding two negatives together will give you a bigger negative so the submarine would then be 5 miles below its original location.

6 0
3 years ago
Natalie has 1/2 gallon of milk. She pours an equal amount of milk each of 8 glasses.
VLD [36.1K]

Answer:

there are 4 quarts in a gallon so therefore the glasses are half a quart

Step-by-step explanation:

yes

3 0
3 years ago
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