MATHEMATICS
MIDDLE SCHOOL

Answer: 100-20=80%

percent means parst out of 100

80%=80/100=8/10=4/5

60=80% of original

60=4/5 of original

times both sides by 5/4

300/4=original

75=original

regular price is $75

percent means parst out of 100

80%=80/100=8/10=4/5

60=80% of original

60=4/5 of original

times both sides by 5/4

300/4=original

75=original

regular price is $75

Answer: 20% of 300 is 60.. But I might be wrong

HIGH SCHOOL

There are an infinite number of points that lie on a period at the end of a sentence. True or False

I say it is true not false.

HIGH SCHOOL

1. Julia deposited $250 in a savings account that earns 2.7% simple interest. How much interest has Julia earned by the end of the first year? $6.75

$92.59

$256.75

$675.00

2. Armand deposited $389.42 in a savings account that earns 3.2% simple interest. What is Armand’s account balance after seven years?

$87.23

$401.88

$476.65

$872.30

3. Andy deposited $1,567.12 in a savings account that earns 1.9% simple interest. What will Andy’s account balance be in nine months?

$1,567.12

$1,589.45

$1,596.90

$1,835.10

Answer:

Step-by-step explanation:

Simple interest formula is :

t is always in years here.

1.

p = 250

r = 2.7% or 0.027

t = 1

Simple interest earned = = $6.75

2.

p = 389.42

r = 3.2% or 0.032

t = 7

Simple interest earned = = $87.23

Amount after 7 years will be = = $476.65

3.

p = 1567.12

r = 1.9% or 0.019

t =

Simple interest earned = = $22.33

Account balance after 9 months = = $1589.45

1. $675

2. $389.42 (3.2)^7

3. 1567.12(1.9)^9/12

2. $389.42 (3.2)^7

3. 1567.12(1.9)^9/12

HIGH SCHOOL

What number would you have to add to both sides to complete the square? X^2-16x=-8

The question is about the number we need to add both sides. It is 64

This step is needed to make the left side of the equation a perfect square. This is done by halving the linear coefficient, squaring that value, and then adding it to both sides of the equation. In this case you would add:

(-16/2)^2=(-8)^2=64

So you would add 64 to both sides...

x^2-16x=-8

x^2-16x+64=56 now the left sides is a perfect square...

(x-8)^2=56

(-16/2)^2=(-8)^2=64

So you would add 64 to both sides...

x^2-16x=-8

x^2-16x+64=56 now the left sides is a perfect square...

(x-8)^2=56

MIDDLE SCHOOL

What is the number three thousand eighty expressed in scientific notation?

Answer:

3.08 x

Step-by-step explanation:

3080 = 3.08 x 1000 = 3.08 x

HIGH SCHOOL

Write the possible explicit formula for the following sequences:

-17, -22, -27, -32

It's an arithmetic sequence:

HIGH SCHOOL

Which product of prime polynomials is equivalent to 36x3 – 15x2 – 6x??

Answer:

The answer is B: 3x(3x – 2)(4x + 1)

Step-by-step explanation:

First you use the x method t

Then you find a and c

After you find and c you times them together

Now you look for b

Now you have to find a number that equals a&c and adds to 10

now you place the numbers in ( )

and boom you get

B: 3x(3x – 2)(4x + 1)

HOPE THIS HELPS YOU STAY SAFE:)

Factor ouf 3x

3x(12x^2-5x-2)

factor

(3x)(3x-2)(4x+1)

3x(12x^2-5x-2)

factor

(3x)(3x-2)(4x+1)

HIGH SCHOOL

Im super confused on how to do this. Please help Jamie has $500 to invest for 3 years. She finds a bank that will invest her money at a simple interest rate of 5%. Interest is T is equal to the principle P times the product of the rate r as a decimal and the time d in years.

Find the amount of interest earned after 3 years.

T = P*r*d

P = 500

r = 5% = 0.05

d = 3 years

500 *0.05*3 = 75

interest = $75

MIDDLE SCHOOL

A car travels at a constant rate of 60 miles per hour complete the table

Miles traveled.

60. 120. 180. 240

------------------------------------

Hour. 1. 2. 3. 4

60. 120. 180. 240

------------------------------------

Hour. 1. 2. 3. 4

Answer:

60 120 180 240

Step-by-step explanation:

hour 1 2 3 4

MIDDLE SCHOOL

Two scientists are measuring lava temperatures. One scientist records temperature of 1725 degrees Fahrenheit. The other scientist records a temperature of 950 degrees Celsius. Which is the greatest temperature? [Use C= 5/9(F - 32)] (Please include how you got the answer, thank you so much!)

The second scientists with 950C the higher temp. How? Take the F and divide it by 9 so F/9 then use that and times it by 5. Now your done with the fraction. Now just minus 32 from that number.

1725/9=191.6repet

191.6repet*5=958.3repet

958.3repet-32=926.3repet

926.3 degrees C is the answer.

1725/9=191.6repet

191.6repet*5=958.3repet

958.3repet-32=926.3repet

926.3 degrees C is the answer.

Answer:55

Step-by-step explanation: