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My name is Ann [436]
3 years ago
7

Hellpppp ASAP. Plzzzz

Mathematics
2 answers:
padilas [110]3 years ago
8 0

Answer:

6 is from the beginning. Multiply first, not add

Step-by-step explanation:

Shalnov [3]3 years ago
8 0

Answer:

6)

5+3(y-4)=5(y+2)-y\\\\5+3y-12=5y+10-y\\\\-7+3y=4y+10\\\\y=-17

The error was made by combining the 5+3(y-4) without first distributing the 3 to both the y and -4.

7)

a)

A(t)=0.30t+45\\B(t)=0.25t+60

b) Now we can set each equal to 150 and solve for t

150=0.30t+45\\\\0.30t=105\\\\t=\frac{105}{0.30} \\\\t=350

Rob can send 350 texts per month with plan A

150=0.25t+60\\\\0.25t=90\\\\t=\frac{90}{0.25} \\\\t=360

Rob can send 360 texts per month with plan B

c)

A(100)=0.30(100)+45\\\\A(100)=30+45\\\\A(100)=75

B(100)=0.25(100)+60\\\\B(100)=25+60\\\\B(100)=85

If Rob were to send 100 text messages a month, Plan A would be cheaper

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