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2 years ago

Please help for this question

Mathematics

2 answers:

kogti [31]2 years ago

8 0

First you need to subtract the 29 and the 8 - equals 21
Then you subtract 7 and 4- equals 3
Lastly divide 21 and 3 and get the answer which is 7
Hope this helps.

Alexus [3.1K]2 years ago

7 0

Answer is 4, solve the parenthesis first, than divide :)

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A friend asks to borrow $250 for 18 months and agrees to pay 12% annual simple interest. How much interest will you earn? Round

german

Answer: $29.70

Step-by-step explanation:

250 times the annual interest (12%) is converted to 250 times .12 = 29.70

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3 years ago

I need help with these questions (see image). Please show workings.

shtirl [24]

Answer:

Inscribed angle is half of the intercepted arc.
Central angle is the same size as the intercepted arc.

As per above two statements we have:

y = 2*58° = 116°

and

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3 years ago

Read 2 more answers

Rewrite the following equation in standard form. y= -2/7x + 5/8

nikitadnepr [17]

The equation in standard form would be,
$\frac{2}{7} x + y = \frac{5}{8}$
All you have to do is move -2/7x to the other side.

Hope this helped
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8 0

3 years ago

Dream borrowed $500 at an interest rate of 8%. At the end of the loan period, she had to pay back $530. How long was the loan fo

Aliun [14]

Answer:

The loan was for 9 months only

Step-by-step explanation:

In this question, we are concerned with calculating the time taken for a loan om an interest to be paid back

To calculate this, we use the simple interest formula

Mathematically;

I = PRT/100

where P is the principal which is the amount borrowed and that is $500 according to the question

R is the rate which is 8% according to the question

Interest can be calculated by subtracting the principal from the amount paid back = 530-500 = 30$

We now plug these values into the equation

30 = (500 × 8× T)/100

100 × 30 = 4000T

T = 3000/4000

T = 0.75 (same as 0.75 × 12 months = 9 months)

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3 years ago

The t value for a 99% confidence interval estimation based upon a sample of size 10 is

Aliun [14]

Answer:
For a sample size of 10, the t-value is about 3.25 (from tables) at a 99% confidence interval.

Explanation:
When the standard deviation for the population is not known, the confidence interval estimate for the population mean is performed with the Student's t-distribution.
The confidence interval for the mean is calculated as
$(\Bar{x}- t\frac{s}{\sqrt{n}} , \, \Bar{x}+ t\frac{s}{\sqrt{n}}$
where
$\Bar{x}$ = sample mean,
s = sample standard deviation,
t = t-value (provided in tables),
n = sample size.

When reading the t-value, (n-1) is called the df or degrees of freedom.

7 0

3 years ago