I will mark brainliest but please help I don’t get this question...

Help on # 2 please. Thank you!

Alenkasestr [34]

Answer:

There are 9 boys in the choir

Step-by-step explanation:

To solve this, create two equivalent fractions with the information given

boys 3 x

------- = ------ = ------

girls 4 12

Then, cross-multiply

4x = 3(12)

4x = 36

x = 9

3 0

4 years ago

What is 1/3 - 3/7 I really need help with this problem. I'm just a 3rd grader?????

n200080 [17]

33.3333333333333333333333333333333333333333333% continue

7 0

3 years ago

Today Zack sold twice as many bags of popcorn at the ball game as he sold last Saturday. In the 2 days he sold a total of 96 bag

Alexeev081 [22]

Answer:

$s=32\\t=64$

Zack sold 32 bags of popcorn last Saturday, and 64 bags of popcorn today.

Step-by-step explanation:

Start by determining what information the question gives us, and what we need to find.

Given:

Zack sold twice as many bags of popcorn as he sold last Saturday

He sold 96 bags altogether in the 2 days

Find:

s, number of bags he sold last Saturday

t, number of bags he sold today

Equation/System of Equations:

$t=2s$ (OR "number of bags he sold today = number of bags he sold last Saturday multiplied by 2, or twice the amount he sold last Saturday)

$t+s=96$ (OR "number of bags he sold today + number of bags he sold last Saturday is equivalent to the amount of bag he sold altogether which is 96 bags as given by the question)

Solve:

We can solve this system of equations using substitution. In this case, we can substitute "2s" for "t" into the second equation giving us...

$2s+s=96\\3s=96$

Divide both sides by 3. Notice that the Division Property of Equality states that if you divide on side of the equation by something, you must divide the other side by the same quantity.

$s=\frac{96}{3}\\s=32$

Substitute 32 in for "s" to solve for "t"...

$t=2s\\t=2(32)\\t=64$

Answer:

Zack sold 32 bags of popcorn last Saturday, and 64 bags of popcorn today.

3 0

2 years ago

Solve the literal equation −cy+2=3d+7y for y.

babunello [35]

Answer:

y = (2-3d)/(7+c)

Step-by-step explanation:

-cy + 2 = 3d + 7y

To solve this equation in terms of y, we must first move all of the terms containing a y to one side of the equation and move all of the other terms to the other side.

Our first step is going to be to add cy to both sides of the equation.

- cy + cy + 2 = 3d + 7y + cy

2 = 3d + 7y + cy

Next, we can subtract 3d from both sides of the equation.

2 - 3d = 7y + cy

Next, we can factor out a y from the right side of the equation.

2 - 3d = y (7 + c)

Finally, we can divide both sides by the quantity (7+c) to get the y alone on the right side of the equation.

(2-3d)/(7+c) = y

Therefore, your answer is y = (2-3d)/(7+c).

Hope this helps!

3 0

3 years ago

Round 0.683 to the nearest tenth. a.0.7 b.0.68 c.1.0 d.0.6

valentina_108 [34]

Answer:

A. 0.7

Step-by-step explanation:

If you look at your original decimal 0.683, to round to the nearest tenth you would look at the second digit that comes after the decimal so in this case the underlined one 0.683. If that second digit is 5 or greater, which it is, then you would round up to the next highest number from the 1st digit after the decimal, so in this case 7 :)

7 0

3 years ago