MATHEMATICS HIGH SCHOOL

what is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7:3

Answers

Answer 1

Answer:

Answer:

B. 49:9

Step-by-step explanation:

The ratio of surface areas is the square of the ratio of edge lengths:

7² : 3² = 49 : 9

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Which two numbers add up to 5 and multiply to -45 ?

Answers

we have x+y=5
xy=-45
solve
x+y=5
subtract x from both sides
y=-x+5
subsiute -x+5 for y in second equaiton
x(-x+5)=-45
-x^2+5x=-45
add 2x^2-5x to both sides
0=x^2-5x-45
use quadratic equation which is
if you have 0=ax^2+bx+c then x= $\frac{-b+ \sqrt{b^(2)-4ac} }{2a}$ or $\frac{-b- \sqrt{b^(2)-4ac} }{2a}$
sbsitute
1x^2-5x-45
a=1
b=-5
c=-45
subsitute
$\frac{-(-5)+ \sqrt{-5^(2)-4(1)(-45)} }{2(1)}$
$(5+ √(25-(-180)) )/(2)$
$(5+ √(25+180) )/(2)$
$(5+ √(205) )/(2)$

or $\frac{5- \sqrt{} }{2}$ or aprox x=-4.65891 or 9.65891, so the 2 numbers would be those answers for x

1+4=5 2+5=12 3+6-21 8+11=

Answers

I hope you don't mind, but I've answered this several times in the past two weeks, so I'm just copying my previous answer from the last time this question was asked:

This is a common math problem. There are two ways to answer this question but both will give you the same answer. There is a misconception that this can also equal 40. If someone posts that the answer is 40, please let me know and I will explain why that is not actually the answer.

1+4=5
2+5=12
3+6=21
8+11=

These equations are actually:

1*(4+1)=5
2*(5+1)=12
3*(6+1)=21
8*(11+1)=96

Therefore:
8+11 = 96

Ok so here is how this question breaks down.

1(4+1)

2(5+1)=12

3(6+1)=21

8(11+1)=96

Hope this helps!

A telephone pole 13 1/3 feet tall casts a shadow of 16 feet when a person casts a shadow of 6 feet. How tall is the person?

Answers

Five feet tall or 5 feet tall or 60 inches.

Answer:

5 feet tall

Step-by-step explanation:

im on odessy this is right

Jesse was walking at 1 m/s and speeds up to 5 m/s in 2 seconds. What is Jesse's acceleration?

Answers

$a=(v_f - v_i)/(\delta t) = (5m/s - 1m/s)/(2seconds) = (4m/s)/(2seconds)=2m/s^(2)$

To borrow money, you pawn your guitar. based on the value of the guitar, the pawnbroker loans you $840. one month later, you get the guitar back by paying the pawnbroker $1,472. what annual interest rate did you pay? round to the nearest tenth of a percent.

Answers

It would be: 1472/840 * 100 = 147200/840 = 175.02

So, it is 75.02%

For nearest 10th percent it will be 75%

SO 75% IS YOUR ANSWER

Final answer:

The student paid a 900.0% annual interest rate on the loan provided by the pawnbroker.

Explanation:

To calculate the annual interest rate you paid, you need to note that the difference between the amount you paid back and the amount you borrowed is the interest. That's $1,472 - $840 = $632. The way interest works is that you pay a certain percentage of the original amount you borrowed (the principal). So, if we express the interest as a percentage of the principal, we get $632 / $840 = 0.75, or 75%. However, this is the interest rate for one month, as you only held the loan for one month. The annual rate would be this monthly rate multiplied by the number of months in the year, which gives 75% * 12 = 900%. So, the annual interest rate you paid, to the nearest tenth of a percent, is 900.0%.