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Luda [366]
3 years ago
14

The ratio of boys to girls at a movie is 4:7. If there are 21. girls, how many boys are

Mathematics
1 answer:
IrinaVladis [17]3 years ago
3 0

Answer:

12

Step-by-step explanation:

7*3=21 so 4*3=12

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Help with this please
Alik [6]

Answer:

Yes, the given parallelogram is a rectangle.

Step-by-step explanation:

The vertices of parallelogram are J(-5,0), K(1,4), L(3,1) and M(-3,-3).

The slope formula is

m=\frac{y_2-y_1}{x_2-x_1}

JK=\frac{4-0}{1-(-5)}=\frac{4}{6}=\frac{2}{3}

KL=\frac{1-4}{3-1}=\frac{-3}{2}

LM=\frac{-3-1}{-3-3}=\frac{-4}{-6}=\frac{2}{3}

JM=\frac{-3-0}{-3-(-5)}=\frac{-3}{2}

The slopes of opposites sides are same it means they are parallel to each other.

The product of slopes of two consecutive sides is

\frac{2}{3}\times \frac{-3}{2}=-1

Since the product of slopes of two consecutive sides is -1, therefore the consecutive sides are perpendicular to each other.

Yes, the given parallelogram is a rectangle.

7 0
3 years ago
The area of the triangle is 42 square inches. find the value of x when a = x and b = (x+8)
damaskus [11]

Answer:

6 and -14

Step-by-step explanation:

Area of the triangle = 1/2 ab

42 = 1/2 (x)(x+8)

42 *2 = x(x+8)

84 = x²+8x

x²+8x-84 = 0

x²+14x-6x-84 = 0

x(x+14)-6(x+14) = 0

x-6 = 0 and x+14 = 0

x = 6 and -14

Hence the values of x are 6 and -14

3 0
2 years ago
On the three quizzes so far, Eric has scored 75, 92, and 83. What must he score on the fourth
AVprozaik [17]
He can make a 70 or higher to keep a B avg.
3 0
2 years ago
The mass of Earth is 5.97 x 1024 kilograms, and the mass of Venus is 4.87 x 1024 kilograms. What is the difference between the m
strojnjashka [21]

Answer:

1126.4

Step-by-step explanation:

5.97 x 1024 =6113.28

4.87 x 1024=  4986.88

6113.28-4986.88 =1126.4

6 0
3 years ago
Someone sells a product for 10 cents and he sells 1000 products, how much money did he earn
zheka24 [161]

Answer:

$100

Step-by-step explanation:

  1. 10¢ × 1,000 = 10,000¢
  2. To convert to dollars: Cents ÷ cents in 1 dollar
  3. To convert to dollars: 10,000¢ ÷ 100¢ = $100

I hope this helps!

3 0
3 years ago
Read 2 more answers
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