TEST ALGEBRA DUE TONIGHt 11:59 Pm EST I only. Have 23 points at the moment I will give you more I promise. I will give 50-75.
PLZZZ HELP 5 questions
They are attached

1. 30 output

2. 15

3. 348

4. 6

5. 1st graph

Step-by-step explanation:

-7(-5) -5=

35 - 5 = 30

2(2)²+6(2)-5=

2(4)+12-5=

8+12-5=

15

y/3 + 4=120

y+12=360

y=348

3x-15>3=

3x>18=

x>6=

2x-(6x+7)>-19=

2x-6x-7>-19=

-4x-7>-19=

-4x>-12=

x>3

step-by-step explanation:

30% of $420 is 0.30($420) = $126 and $420 + $126 = $546.

or, 130% of $420 is 1.3($420) = $546.

notice that this is not the $600 original list price with which we started.

why doesn't this work?

the method does not work because 30% of $420 is not the same amount as the 30% of $600. it may seem obvious when stated this way, but it is a very common error made on problems of this type. we cannot just use the same percent and get back to the original amount because we are taking that percent of a different value.

to work problems of this type correctly, it is generally best to write an equation for the situation and then solve.

example: since (100% – 30%)(original price) = (sale price)

70% of the   (original price) is $420.

0.7x   = 420

equation image indicator

x = 600

the original cost was $600.

we may also solve this problem using the two-step method. working the problem in two steps requires us to use more algebra skills. we have to know that x = 1x (identity property of multiplicationtext annotation indicator) and that 1x – 0.3x = 0.7x (subtracting like terms). then we solve the problem as follows:

(original price) – 30%(original price) = sale price

x – 0.3x = 420

0.7x = $420

equation image indicator

x = 600

the original cost was $600.  

note that with both of the above methods we do obtain the correct original amount.

example: after a 5% pay raise, hermione is earning $22,680 per year. what was she earning before the pay raise?

105% of (original salary) = current salary

1.05x = 22,680

equation image indicator

x = 21,600

hermione earned $21,600 per year before the pay raise.

this is an example so maybe you will get how to at least do it!

what?

step-by-step explanation: