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3 years ago

10

There are 7 more girls than boys in a class. There are 23 students in the class in all how many girls are there in the class. Wh

at are the unknowns in this problem?

1 answer:

Flura [38]3 years ago

6 0

The unknown is how many girls and boys are in the class.

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In one school, half of all students who like math like science as well. Also, in that school, a third of all students who like s

Nimfa-mama [501]

Answer:

2/3

Step-by-step explanation:

If we have 'x' students who like math and 'y' students that like science, we can formulate that:

Half of x likes math and science, and also one third of y likes math and science, so:

(1/2) * x = (1/3) * y

x / y = (1/3) / (1/2)

x / y = (1/3) * 2 = 2/3

So the ratio of the number of students who like math to the number of students who like science is 2/3

3 0

3 years ago

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The recycling center collected 48,000 ounces of

Leona [35]

Answer: 1.5 tons

Step-by-step explanation:

Given

The recycling center collected 48,000 ounces of aluminum can

An ounce is the unit of weight and it can be expressed in tons as

$1\ \text{ounce}=3.125\times 10^{-5}\ \text{tons}$

$\therefore 48,000\ \text{ounces} \equiv\ 3.125\times 10^{-5}\times 48,000=1.5\ \text{tons}$

8 0

3 years ago

What is the value of the expression below when a = 3 and b = 7?

svp [43]

Answer:

42

Step-by-step explanation:

9^2*7-2*7

56-14

42

I hope this helps.

6 0

3 years ago

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Ramon travels 20 miles in 20 minutes, how many miles can he travel in 120 minutes?

Elis [28]

Answer: 120

Step-by-step explanation:

20 divided by 20 is 1.

We have to multiply this by 120.

120 x 1 = 120. It is the answer.

4 0

3 years ago

What two-dimensional figure will result from slicing this rectangular pyramid parallel to the base?

andreev551 [17]

Answer: The answer is D. Trapezoid.

Step-by-step explanation: As shown in the attached figure, a rectangular pyramid ABCDE is drawn. We are slicing this rectangular pyramid parallel to the base BCDE at the points F, G, H and I.

We can clearly see from the figure that upper half of the sliced figure will be similar to the pyramid BCDE and the lower sliced figure will be a trapezoid. These are the three-dimensional figures.

Also, the sliced two-dimensional figure FGHI will be a rectangle, because

the pyramid is a rectangular one and so, FI=GH, FG=HI and all the angles are right angles.

Thus, the resulting two-dimensional figure will be a rectagle.

7 0

3 years ago

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