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ivann1987 [24]
3 years ago
12

Solve the following system of equations by substitution

Mathematics
1 answer:
Deffense [45]3 years ago
7 0
Dhdjdjdjdididjdndn hfnfjfjcjfjjff
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In preparation to buy a new video game that cost $65, your friend plans on saving money each month for the purchase of the game.
andreev551 [17]

Answer:

After 20 months

Step-by-step explanation:

This is a compound growth problem which has the formula:

F=P(1+r)^t

Where

F is future value

P is present amount

r is the rate of growth

t is the time (in months)

Future amount is $65, what he needs at-least

P is the initial amount, that is $10

r is the rate of growth, which is 10% or 10/100 = 0.1

t is time in months, what we need to find

Substituting and solving we get:

F=P(1+r)^t\\65=10(1+0.1)^t\\65=10(1.1)^t\\6.5=1.1^t\\ln(6.5)=ln(1.1^t)\\ln(6.5)=t*ln(1.1)\\t=\frac{ln(6.5)}{ln(1.1)}\\t=19.64

<u>He would need 19.64 months to save up at-least 65. So, that means, he would need 20 months</u>

5 0
3 years ago
Find the area of this composite figure.
kodGreya [7K]

Answer: 171 cm

Step-by-step explanation: im not sure if this is right but

9x12=108

9x7=63

108+63=171

6 0
3 years ago
Read 2 more answers
ILL GIVE BRAINLEST
WINSTONCH [101]

Answer:

dont you have the answer beside it? Or is that an x?

Step-by-step explanation:

8 0
3 years ago
Maya, Ahmad, and Joe served a total of 75 orders Monday at the school cafeteria. Joe served 2 times as many orders as Maya. Ahma
Basile [38]

Total number of orders served by Maya, Ahmad and Joe on Moday = 75

Let the number of orders Maya served be x.

Then :

Number of orders Joe served = 2x

Number of orders Ahmad served = x - 5

This can be written in an equation as :

\tt \: 2x + x - 5 + x = 75

= \tt 4x - 5 = 75

= \tt 4x = 75 + 5

= \tt 4x  = 80

=  \tt \:  x =  \frac{80}{4}

=  \tt \: x = 20

Which means :

Number of orders Joe served :

= 2 × 20

= 40

Thus, Joe served 40 orders.

Number of orders Maya served = 20

Number of orders Ahmad served :

= 20 - 5

= 15

Thus, Ahmad served 15 orders.

<h2>Therefore, </h2>
  • Maya served 20 orders
  • Ahmad served 15 orders
  • Joe served 40 orders.
5 0
3 years ago
What's the answer for p2 when p=25 ​
Sever21 [200]
Answer is 625
Hope it helps :)
8 0
3 years ago
Read 2 more answers
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