MATHEMATICS HIGH SCHOOL

Find f(x)-g(x)
f(x)=7x+15 g(x)=5x-6

Answers

Answer 1
Answer:

Answer: 2x+21

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Work Shown:

f(x) - g(x) = [ f(x) ] - [ g(x) ]

f(x) - g(x) = [ 7x+15 ] - [ 5x-6 ]

f(x) - g(x) = 7x+15 - 5x+6

f(x) - g(x) = (7x-5x)+(15+6)

f(x) - g(x) = 2x+21

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2:5 and 30:20 are equal ratios. True or false

Answers

The answer is false.
For being in equal ratios, product of means = product of extremes
2:5 :: 30:20
2 × 20 = 30 × 5
40 ≠ 150
So, its false since they are unequal.

What survival rate in the 10th year would make the average rate of loss over the 10-year period equal to 38.0%?

Answers

Answer: 63%

Step-by-step explanation:

First find the rate of loss that would cause the average rate of loss over the 10-year period equal to 38.0%.

Assume that rate is x.

38 = (36.2 + 29.0 + 46.2 + 37.5 + 40.9 + 40.0 + 32.6 + 40.5 + 40.1 + x) / 10

38 = (343 + x ) / 10

380 = 343 + x

x = 380 - 343

x = 37%

The survival rate is the opposite of the rate of loss which means that the survival rate is;

= 1 - rate of loss

= 1 - 37%

= 63%

$6.50 is what percent of $130

Answers

   
\displaystyle \n p = (6.5)/(130) * 100 = (6.5* 100)/(130)= (650)/(130)= \boxed{ 5\% }

A circle has a radius of 11 cm. What is the approximate area of the circle? Use 3.14 to approximate pi. Write the answer to the nearest hundredth.

Answers

area of a circle is pi x r x r 
then you substitute the numbers in
therefore you would get 3.14 x 11 x 11 = 379.994
to the nearest hundredth degree would to 379 cm squared because you are finding the area so you put a small 2 above the cm
the person above has done it wrong as they have halved the radius but you only have the diameter to get the radius and they have used the wrong equation 

$3450 is invested into an account earning 2.27% interest for 5 years. Compounded monthly.

Answers

$3,536.65 I believe

3 times the sum of the first and the third integer is equal to 30 more than 4 times the second integer

Answers

there should be many answer to this question.. like if the second number is 3 the first and third numbers can be 6,8/9,5/10,4/11,3/12,2/13,1
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