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3 years ago

6

Jason predicted that 227 students would attend the school dance. The actual number was 250. What is the percent error of Jason’s

prediction?

2 answers:

BartSMP [9]3 years ago

4 0

The percent error is 9.2%

VikaD [51]3 years ago

3 0

Answer:

9.2%

Step-by-step explanation:

227/250= .908

1.00-90.8=9.2

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1. Solve for x 3(x-6)+24=50+4(x+10)

MA_775_DIABLO [31]

X=-84. 3(x-6)+24=50+4(x+10)
distrubute. 3x-18+24=50+4x+40
move terms. 3x+6=90+4x
collect like terms 3x-4x=90-6
subtract -x=84
divide by -1. x=-84

3 0

3 years ago

A rectangular piece of metal is 25 in longer than it is wide. Squares with sides 5 in long are cut from the four corners and the

Licemer1 [7]

Answer:

The original length was 41 inches and the original width was 16 inches

Step-by-step explanation:

Let

x ----> the original length of the piece of metal

y ----> the original width of the piece of metal

we know that

When squares with sides 5 in long are cut from the four corners and the flaps are folded upward to form an open box

The dimensions of the box are

$L=(x-10)\ in\\W=(y-10)\ in\\H=5\ in$

The volume of the box is equal to

$V=(x-10)(y-10)5$

$V=930\ in^3$

so

$930=(x-10)(y-10)5$

simplify

$186=(x-10)(y-10)$ -----> equation A

Remember that

The piece of metal is 25 in longer than it is wide

so

$x=y+25$ ----> equation B

substitute equation B in equation A

$186=(y+25-10)(y-10)$

solve for y

$186=(y+15)(y-10)\\186=y^2-10y+15y-150\\y^2+5y-336=0$

Solve the quadratic equation by graphing

using a graphing tool

The solution is y=16

see the attached figure

Find the value of x

$x=16+25=41$

therefore

The original length was 41 inches and the original width was 16 inches

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3 years ago

Elaine opens a checking account with a deposit of $20.00 and wants to put the same amount of money

Snowcat [4.5K]

Answer: 200 = m x 10 + 20

Step-by-step explanation:

She wants a balance of 200 with the same amount of money (m) going into the account for 10 weeks plus the amount she began with

7 0

3 years ago

I need to know how to do Solving Systems of Equations by Elimination

vredina [299]

The point of elimination is to have one variable so example

3x + 2y = 4

7X + 3y = 5

1) Try to find a way to have one variable

7(3x + 2y = 4) ----> 21x + 14y = 28

-3(7x+ 3y = 5) -----> -21x -9y = -15

2) add

0 + 5y = 13

3) solve for the last variable

5y = 13
y = 13/5 = 2 3/5 = 2.8

4) Subsitute the variable to get the other one

3x + 2(2.8) = 4

3x + 5.6 = 4

3x = -1.6

x = 0.533333333 (continue)

The intersection would be 0.53 with a line above the 3 and 2.8. (0.5333 , 2.8)

Hope you understand!!

6 0

3 years ago

An amusement park charges an admission fee of 40 dollars per person. The cost, C (in dollars), of admission for a group of P peo

timama [110]

The answer is $80 because it's $40 per person so two people is $80

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3 years ago