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Elis [28]
3 years ago
15

What is 5r^2 = 80 It says solve each equation with the quadratic formula.

Mathematics
1 answer:
katovenus [111]3 years ago
5 0
5r^2 = 80 \ \ /:5\\ \\r^2=\frac{80}{5}\\ \\r^2=16\\ \\r^2-16=0\\ \\ r^2 - 4^2 =0 \\ \\(r-4)(r+4)=0

r-4=0 \ \ \vee \ \ r+4 =0 \\ \\r=4 \ \ \vee \ \ r = -4 \\ \\ \\ a^2-b^2 = (a- b)(a+b)


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8 0
3 years ago
Selena made pancakes for an all day breakfast fundraiser event she made 132 pancakes in 4 hours Selena used 44 cups of pancake b
irga5000 [103]

Answer:

88 cups of batter

Step-by-step explanation:

We are told from the the question: Selena used:

132 pancakes was made from = 44 cups of pancake batter

how many cups of batter will Selena use to make an additional 264 pancakes?

132 pancakes = 44 cups of pancake batter

264 pancakes = ??

Cross Multiply

= 264 × 44/132

= 11616 / 132

= 88 cups of pancake batter.

Therefore, selena would be needing 8( cups of pancake butter to make an additional 264 pancakes.

8 0
3 years ago
a parking lot contains (2 wheels) and cars (4 wheels). There are 35 vehicles and 114 wheels. How many motorcycles amd cars are t
ELEN [110]

Answer:

There are 13 motorcycles and 22 cars

Step-by-step explanation:

Let x represent the number of motorcycles, and let y represent the number of cars.  We can set up a system of equations to solve this...

x + y = 35          (there are a total of 35 vehicles)

2x + 4y = 114      (the total number of tires)

Solve the first equation for either variable...

y = 35 - x

Now substitute that value into the other equation and solve...

2x + 4(35 - x) = 114              (y becomes 35 - x)

Now solve...

2x + 140 - 4x = 114

     -2x = -26

            x = 13               (there are 13 motorcycles)

Now plug that value into either original equation to solve for y...

13 + y = 35

   y = 22    (there are 22 cars(

3 0
3 years ago
First person to guess my fav color i will mark brainliest answer:)
Ad libitum [116K]

I think its either blue, black, or red

4 0
3 years ago
Read 2 more answers
Can someone plz help me with number 2
Andrew [12]
J $4,000 would be the best answer.
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3 years ago
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