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Sindrei [870]
3 years ago
12

Help...

Mathematics
1 answer:
PolarNik [594]3 years ago
4 0

Answer: perm will cost $48

Step-by-step explanation:

Let x be cost of haircut

So perm will cost her 2x

So

x + 2x + 5 = 77

3x = 72

x = 24

Perm will cost 2x24 = 48

You might be interested in
An experimental population of fruit flies increases according to the law of exponential growth. There were 60 flies after the 2n
Mice21 [21]

Answer:

There were 10 flies originally

Step-by-step explanation:

Since we have an exponential growth, we will be having a constant percentage of increase and we can set up the increase at any day using the following equation;

V = I(1+r)^d

where V is the number of flies on a particular day

I is the initial number of flies

r is the constant increase in percentage

and d is the number of days.

So we have for the second day;

60 = I(1+r)^2 ••••••(i)

For the fourth day, we have;

360 = I(1+r)^4 ••••••••(ii)

divide equation ii by i; we have;

360/60 = (1+r)^4/(1+r)^2

6 = (1+r)^2

(√6)^2 = (1+r)^2

1 + r = √6

r = √6 - 1

So we can substitute the value of r in any of the equations to get I which is the initial number of flies

Let’s use equation 1

60 = I(1 + r)^2

60 = I(1 + √6 -1)^2

60 = I(√6)^2

60 = 6I

I = 60/6

I = 10 flies

3 0
3 years ago
Can someone please solve this please.
Lelu [443]

Answer:

A≈576.31

Step-by-step explanation:

surface area = bh + L(s1+s2+s3)

surface area = (13*11) + 13 * (10+11+14.87)

8 0
2 years ago
An angle measures 54° less than the measure of a supplementary angle. What is the measure of each angle?
Katen [24]
X+x+54=180
2x+54=180
2x=126
x=63
63+54=117
one angle is 63, the other is 117
8 0
3 years ago
A deep sea diver is 4.5m below the water level At what depth he is now ? At what height is he now
oee [108]

Answer:

Step-by-step explanation:

Below the sea level should be mentioned by negative value

So, It is  =  - 4.5

7 0
3 years ago
I meant to put the file but i guess it didnt upload.
Luba_88 [7]

Answer:

8

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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