ALGEBRA SOLVING MULTI-STEP EQUATIONS NEED HELP FAILING GRADE IF I GET THESE WRONG =(?

Question

1.   Solve. x – 7 > 10  
x > 3
x > 7
x > 17
x > 70

2.   Solve. 3x ��� 21  
x ≤ 7
x ≥ 7
x ≤ 18
x 18

3.   Solve. 6n – 3 > – 18  
n > –3
n > –2.5
n > –15
n > –24

4.   Solve. 3s + 6 ≤ –5(s + 2)  
s ≤ 11
s ≤ 12
s ≤ –5
s ≤ –2

5.   Suppose you earn $7.25 per hour working part time for a florist. Write and solve an inequality to find how many full hours you must work to earn at least $125. 
at least 15 hours
at least 18 hours
at least 20 hours
at least 25 hours

6.   On a trip from Williamsburg, Virginia, to Orlando, Florida, a family wants to travel at least 250 miles in the first 5 hours of driving. What should their average speed be in order to meet their goal? 
average speed of 40 mph
average speed of 45 mph
average speed of 50 mph
average speed of 55 mph

MOST I FIGURED OUT BUT SO FAR THE LAST 2 THINGS I DID I THOUGHT I NEW BUT THEN GOT A 0% ON BOTH SO I NEED HELP =(

Esmeralda · Accepted Answer

Tip: You always want to get x by itself.

I'll help you with two

1. Solve. x – 7 > 10
 x – 7 > 10
(then add 7 to 7 and 10, but 7+7 gets cancelled out.)
    +7   + 7
= x > 17

2. Solve. 3x ≤ 21

(easy, what's 21 divided by 3?)
The sign is flipped when it comes to division.

EDIT: I'll help you with the rest. I'll tell you what to do.

3. Leave 6n by itself, then do the rest.
4.  -5(s +2) multiply that, combine like terms

Not too sure about 5 and 6. Google it, I'm sure it'll say.

Hope this somewhat helped!

Anonymous · Answer

locate the straightforward denominator of x/2 and x/4, which hence is 4. So, the recent equation might want to be 2x/4 + x/4 = 5 hence, 3x/4 = 5 Multiply each and every section via 4 and also you get 3x = 20 Divide via 3 and also you get x = 20/3 or 6.66666666

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ALGEBRA SOLVING MULTI-STEP EQUATIONS NEED HELP FAILING GRADE IF I GET THESE WRONG =(?

2 Answers