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rosijanka [135]
3 years ago
8

Zoe has a collection of 78 movies. Each one cost $29.99. How much did Zoe spend on all her movies

Mathematics
2 answers:
luda_lava [24]3 years ago
5 0
78 times 29.99=2339.22
Anuta_ua [19.1K]3 years ago
4 0
Zoe spent $107.99 on all of her movies. The movies cost $2.60 each.
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alekssr [168]

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Step-by-step explanation:

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2 years ago
Please help, super hard question for me!
dem82 [27]

Answer:

Step-by-step explanation:

When using the substitution method we use the fact that if two expressions y and x are of equal value x=y, then x may replace y or vice versa in another expression without changing the value of the expression.

Solve the systems of equations using the substitution method

{y=2x+4

{y=3x+2

We substitute the y in the top equation with the expression for the second equation:

2x+4            =      3x+2

4−2              =        3x−2

2===             =         x

To determine the y-value, we may proceed by inserting our x-value in any of the equations. We select the first equation:

y= 2x + 4

We plug in x=2 and get

y=  2⋅2+4 = 8

The elimination method requires us to add or subtract the equations in order to eliminate either x or y, often one may not proceed with the addition directly without first multiplying either the first or second equation by some value.

Example:

2x−2y = 8

x+y = 1

We now wish to add the two equations but it will not result in either x or y being eliminated. Therefore we must multiply the second equation by 2 on both sides and get:

2x−2y = 8

2x+2y = 2

Now we attempt to add our system of equations. We commence with the x-terms on the left, and the y-terms thereafter and finally with the numbers on the right side:

(2x+2x)  + (−2y+2y) =  8+2

The y-terms have now been eliminated and we now have an equation with only one variable:

4x = 10

x= 10/4 =2.5

Thereafter, in order to determine the y-value we insert x=2.5 in one of the equations. We select the first:

2⋅2.5−2y     =  8

5−8             = 2y

−3               =2y

−3/2            =y

y                 =-1.5

6 0
2 years ago
Find the length of the missing side. Leave your answer in simplest radical form.
malfutka [58]
Solve for hypotenuse

Hypotenuse = \sqrt{a^{2}+b^{2}}

Substitute 3 for A and 4 for B
\sqrt{3^{2}+4^{2}}

Solve exponents
3^2 = 9
4^2 = 16
\sqrt{9+16}

Add
9 + 16 = 25
\sqrt{25}

Solve square root
\sqrt{25} = 5
5 is your answer
5 0
3 years ago
Read 2 more answers
Yohan Blake ran the 100-meter race in the 2012 Olympics in 9.75 seconds. Compare the speeds if he ran the 200-meter race in 19.5
lakkis [162]

Sorry for the late response :<

Answer:

The unit rates would be comparable for both races. So, his speed is going to be the same for both races.

<3

8 0
2 years ago
Read 2 more answers
How do you do this we need some really big help so help us please
rewona [7]
Well that's division.
•36 divided by 9 is equal to 4.
• 81 divided by 9 is equal to 9.
•45 divided by 5 is equal to 9.
•56 divided by 7 is equal to 8.
•42 divided by 7 is equal to 6.
7 0
3 years ago
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