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Burka [1]
3 years ago
7

If AB=BC,AB=4=4x-2,andBC=3x+3,fine the length of AB

Mathematics
1 answer:
laila [671]3 years ago
3 0

Answer:

18

Step-by-step explanation:

First, I'm assuming AB=4=4x-2 was a typo and it's supposed to be AB = 4x - 2

AB=BC

AB = 4x - 2 BC = 3x + 3

4x - 2 = 3x + 3

Solve for x Add 2 to each side

4x - 2 = 3x + 3

4x - 2 + 2 = 3x + 3 + 2

4x = 3x + 5 Subtract 3x from each side.

4x - 3x = 3x- 3x + 5

4x - 3x = 5

x = 5

Now plug back in to the original equations

AB = 4x - 2                  BC = 3x + 3

AB = 4 (5) - 2               BC = 3(5) + 3

AB = 20 - 2                  BC = 15 + 3

AB = 18                        BC = 18

So AB is 18

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In a 5% sale, the price of a phone is reduced by £19.4 Find the original price of the phone
gulaghasi [49]

Answer:

The original price of the phone is £388.

Step-by-step explanation:

Since 5% of the price of the phone is reduced, you can simply multiply the reduced number which is £19.4 by 20.  Your final answer should be £388 when you put it on a calculator or do it on a piece of paper.

4 0
3 years ago
PLEASE HELP ASAP !!!
BartSMP [9]
You know that a straight line has an angle of 180 degrees; 

48+x+x=180 <-- since they are all on the same time
48+2x=180 
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2x=132
x=132/2
x=66

Therefore, the x value is 66 degree. 

Hope I helped :) 
8 0
3 years ago
James bought a new sweatshirt from Foot Locker for $39.98 with tax of 7% that was added at the register. James gave the cashier
Veseljchak [2.6K]

Answer: 2.2214

Step-by-step explanation:

0.07 x 39.98 = 2.7986 (is tax)

2.7986 + 39.98 = 42.7786

45.00 - 42.7786 = 2.2214

6 0
2 years ago
Can somebody help me out? I’ll mark as brainliest.
Fofino [41]

Answer:

f(x) = -5x - 14

Step-by-step explanation:

this table represent a straight line : y = mx +c

first find m which is the slope

m = (-24 - -19)/(2-1)  = -5

then find c

-19 = -5(1) + c , c = -14

thus f(x) = -5x -14

4 0
3 years ago
Hi i’m having a hard time with this can somebody please help
KiRa [710]

Answer:

12

Step-by-step explanation:

If you put the 24 in the place of the place of the x, the answer is 12.

I could be wrong, but I'm pretty sure that's how you do it.

6 0
3 years ago
Read 2 more answers
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