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3 years ago

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Mathematics

1 answer:

FrozenT [24]3 years ago

3 0

Answer:

37.5 percent

Step-by-step explanation:

Finding percent is simple. You want to find percent of the price drop so you subtract 50 from 80 and get 30. Once you get 30 you divide by 80 (your original price). Once you do this you will get 0.375. Multiply this by 100 to get your percent.

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An office building has two elevators. One elevator starts out on the 4th floor, 35 feet above the ground, as it’s defending at a

iren2701 [21]

The system of equations are y = 35 - 2.2x and y = 1.7x

Solution:

Given that, office building has two elevators.

One elevator starts out on the 4th floor, 35 feet above the ground, as it’s descending at a rate of 2.2 feet per second

Let "x" be the number of seconds for which the elevator is descending

Therefore, for "x" seconds the descended feet is 2.2x feet

The elevator is at 4 th floor, 35 feet above ground

Therefore, from 35 feet, the elevator has descended 2.2x feet for "x" seconds

Let "y" be the final position of elevator after "x" seconds

Therefore,

y = 35 - 2.2x

The other elevator starts out at ground level and is rising at a rate of 1.7 feet per second

Here, the elevator is rising at a rate of 1.7 feet per second

Therefore, for "x" seconds, the elevator has raised 1.7x feet

Here the elevator is at ground level, therefore

y = 1.7x

Thus the system of equations are y = 35 - 2.2x and y = 1.7x

6 0

3 years ago

7900 dollars is placed in an account with an annual interest rate of 5.5%. How much will be in the account after 11 years?

My name is Ann [436]

Answer:

$\$12,679.50$

Step-by-step explanation:

we know that

The simple interest formula is equal to

$A=P(1+rt)$

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=11\ years\\ P=\$7,900\\ A=?\\r=5.5\%=5.5/100=0.055$

substitute in the formula above

$A=7,900(1+0.055*11)$

$A=7,900(1.605)$

$A=\$12,679.50$

6 0

2 years ago

Can you give me a word problem that can be solved by finding the difference of 432,906 and 61,827.

notka56 [123]

Laurence bought 432,906 lbs of soil for her garden. She only used 61,827 lbs. How much lbs of soil does she have left over?

7 0

3 years ago

Read 2 more answers

The function C gives the cost, in dollars, to shred w pounds of confidential documents of a company.

SSSSS [86.1K]

C’(500)=80 means at 500 pounds of documents, the cost is increasing at a rate of $80 dollars/pound

8 0

2 years ago

Hi! I just need someone to check if this is correct I also have to show the work so if you can that is much appreciated! The per

Anestetic [448]

Perimeter (P) of a square = 4s ; where s is the length of a side

1 yd = 4s

$\frac{1}{4}$ yd = s

Area (A) of a square = s²

= ( $\frac{1 yd}{4}$ )²

Now, convert from yard to foot to inch:

( $\frac{1 yd}{4}$ )² x ( $\frac{3 ft}{1 yd}$ )² x ( $\frac{12 in}{1 ft}$ )²

= (3 x 3 x 12 x 12) ÷ (4 x 4)

= 81 in²

7 0

3 years ago