Solve for the unknown variable "x" in the following linea equation: 2 ( 2x + 20) = 80 X =

Mathematics

1 answer:

Stella [2.4K]3 years ago

4 0

Step-by-step explanation:

2(2+20)=80

4+40=80 (Distribute)

4+40-40=80-40(Subtract from both sides of the equation)

4=40(Simplify)

4/4=404/4(Divide both sides of the equation by the same term to get x=10)

=10

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NEED HELP POR FAVOR

Leto [7]

K so you have to set 2 equations like this
x meaning the amount of adults
and y meaning the amount of kids

x+y=11
13.5x+8.25y=111.75

Then use substitution method and you get
x=11-y from the first equation
plug that in to the second and you get

13.5(11-y)+8.25y=111.75
Solve for y in that equation by distributing and then combining like terms
148.5 - 13.5y + 8.25y = 111.75
148.5 - 5.25y = 111.75
Then, you need to subtract 148.5 from each side and cancel the negatives

5.25y=36.75
solve for y and you get
36.75/5.25 = 7
y=7
7 Children attended the movie.

Hope this heldped!

7 0

4 years ago

Pls help! I'm confused. Can you explain this if you can.

alexdok [17]

Answer:

From a table, for an ordered pair (0, y), y will not be zero. From a graph, the y-intercept will not be zero. From an equation, it will have the form, y = mx + b where b is ≠ 0.

Step-by-step explanation:

From a table, for an ordered pair (0, y), y will not be zero. If there is not a constant rate of change in the data displayed in a table, then the table represents a nonlinear nonproportional relationship.
From a graph, the y-intercept will not be zero. This means that it doesn't contain or go through the origin.
From an equation, it will have the form, y = mx + b where b is ≠ 0. (not equal to zero). If an equation is not a linear equation, it represents a nonproportional relationship. A linear equation of the form y = mx + b may represent either a proportional (b = 0) or nonproportional (b ≠ 0) relationship. Therefore, when b ≠ 0, the relationship between x and y is nonproportional.

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3 years ago

Need help on 6th grade edge really need help worth my grade also i have more questoins so pls help

Natalka [10]

A^2+24^2=25^2

a^2+576=625

a^2=49 *square root both sides*

a=7 so the answer would be option A

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3 years ago

Please solve 24 with reason why

Radda [10]

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