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Verdich [7]
3 years ago
9

At a school dance, the ratio of girls to boys is 8:3. If there are 528 students at the dance, how many are boys and how many are

girls?
Mathematics
1 answer:
weqwewe [10]3 years ago
6 0

Answer:

144 boys and 384 girls

Step-by-step explanation:

8 girls to every 3 boys. You can make an equation to solve this: 8x + 3x = 528. 528 = 11x. Then divide 528 by 11 to get 48. x=48. 8(48) = 384 girls. 3(48) = 144 boys.

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Ugo [173]
One car 40 miles /gallon
other car 30 miles/gallon
..
Total miles = 165
gas used = 45 gallons
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let first car drive x miles
second car drive y miles
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x/40 + y/30 = 45
(30x+40y)/30*40 = 45
30x+40y = 45*40*30
30x+40y=54,000
6 0
3 years ago
Read 2 more answers
A construction crew is lengthening a road that originally measured 47 miles. The crew is adding one mile to the road each day. L
Dmitry_Shevchenko [17]

Answer:

78 miles

Step-by-step explanation:

Given that:

Original length, L = 47 miles

Additional length (miles) added per day, = 1 mile

Representing as an equation :

L(D) = original length + additional length per day * number of days

Let, D = number of days

L(D) = 47 + D

Length after 31 days :

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= 78 miles

3 0
3 years ago
What is the value of f(5) in f(x)=-2(x+1)
IceJOKER [234]

Answer:

-12

Step-by-step explanation:

4 0
3 years ago
Y = 5x - 10<br> Can you solve for x
tensa zangetsu [6.8K]

Answer:

x = \frac{1}{5}y + 2     or       x = \frac{y+10}{5}     (Not sure which one is preferred in your case)

Step-by-step explanation:

<u>Key skills needed: Evaluating expressions</u>

1) We are given: y = 5x-10

2) To solve for the x variable, we want to leave the term with "x" by itself.

This means we add 10 to both sides

--> y + 10 = 5x (Since -10 and +10 cancel out to make 0 or nothing)

3) Then we divide by 5 on both sides to get "x" completely by itself.

-----> \frac{y+10}{5} = x

4) You can keep it as is so --> x = \frac{y + 10}{5}

or you can divide "y" by 5 and "10" by 5 and get --> x = \frac{1}{5} y + 2

(I am not sure which form is preferred one is preferred as the teacher matters)

<em>Hope you understood and have a nice day!!</em>

6 0
3 years ago
Read 2 more answers
Find the area of the following triangle. Round your answers to the nearest tenth. a = 44 in, b = 66 in, c = 88 in
swat32
P=44+66+88/2=198/2=99
With Heron formula:
S=root 99*(99-44)(99-66)(99-88)=root 99*55*33*11=root 1976535= 1405.8929.....=1405.9
6 0
3 years ago
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