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r-ruslan [8.4K]
3 years ago
6

Brian invests £4000 into his bank account.

Mathematics
1 answer:
GuDViN [60]3 years ago
7 0

Answer:

10.24 years

Step-by-step explanation:

The computation of the time period is as follows:

As we know that

Amount = Principal × (1 + rate of interest)^time period

£8000 = £4000 × (1 + 0.07)^time period

£8,000 ÷ £4,000 = 1.07^time period

2 = 1.07^time period

Now apply the log to the both sides

log 2 ÷ log 1.07 = time period

= 10.24 years

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R(x)=_3x^2+48×<br> C(x)=6x+120
DiKsa [7]

Answer:

R (6x + 120) = 108x^2 + 4608x +48960

Step-by-step explanation:

Set Up Composite function and evaluate

4 0
3 years ago
An initial investment of $60.00 increases in value by 15% each year. Which of the following statements are true? Select all that
VikaD [51]
15% each yer
represented by
f(x)=60(1.15^x)

xintercept is when the function equals zero
since it increases only, it cannot equal zero and does not have an x intercept

after 4 years the investment value is 104
after 6 yaers value is 138.7
after 7.86 years the value is179.98 which is roughly 3 times of 60
8 years later183.54 close enough










answers
f(x)=60*1.15^x
after 7.86 years value is 3 times initioal value
after 8 years value is 184

4 0
4 years ago
Read 2 more answers
I got two questions I need help with
vazorg [7]

Answer:1.A

2.D

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
How do you think you could represent the number 2,300 as a number times a multiple of 10? How do you think you could represent t
iren [92.7K]
Well this question is actually a piece of cake. Just pick your favorite number. Multiply it by 10. Then do whatever operation you want with the 2,300. For the exponent part of this. Lets say we do it this way y times z equals 2,300. Exponents are letters used in mathematical terms. So any letter can be used to represent any number.
5 0
3 years ago
SOLVE y = 3x – 2 x – y = 4 BY USING SUBSTITUTION!! SHOW ALL WORK! HELPPP!
Setler79 [48]

Answer:

(-1,-5)

Step-by-step explanation:

So we have the system:

y=3x-2

x-y=4.

We are asked to use substitution. Luckily, it is already setup for this because one of the equations has one of the variables solved for, namely the y=3x-2 equation.  We are going to insert y=3x-2 into x-y=4 and solve for x.

x-y=4  (with y=(3x-2) ):

x-(3x-2)=4

Distribute:

x-3x+2=4

Combine like terms:

-2x+2=4

Subtract 2 on both sides:

-2x    =2

Divide both sides by -2:

 x     =-1

Now if y=3x-2 and x=-1, then y=3(-1)-2=-3-2=-5.

So the solution is (-1,-5).

3 0
3 years ago
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