can someone help me? 8th grade math

Can Someone Help Me? 8th Grade Math

Answers

Answer 1

9514 1404 393

Answer:

  a. 5^-3

  b. 14^18

  c. 8^9

  d. 16^3

  e. 21^-18

Step-by-step explanation:

The applicable rules of exponents are ...

  (a^b)(a^c) = a^(b+c)

  (a^b)/(a^c) = a^(b-c)

  (a^b)^c = a^(bc)

__

a) 5^(3-6) = 5^-3

b) 14^(3·6) = 14^18

c) 8^(3+6) = 8^9

d) 16^(6-3) = 16^3

e) 21^(3(-6)) = 21^-18


Related Questions

Which equation, when solved, results in a different value of x than the other three?

Answers

Is there any more information?

5. Katie is 4 years younger than her brother. When
Kate was 27, how old was her brother?

Answers

Answer:

Katie’s brother is now 31 years old

Step-by-step explanation:

You would add 4 to 27

Find the percent of increase from 36 inches to 43 inches. Round to the nearest tenth of a percent if necessary.

Answers

Answer:

27.78

Step-by-step explanation:

(46-36):36*100 =

(46:36-1)*100 =

127.77777777778-100 = 27.78

Now we have: What is the percentage increase/decrease from 36 to 46 = 27.78

Angle A is a supplementary to Angle B. If < b = 65 degrees what is the value of x if < A = 5x -20 ?

Answers

Answer:

x = 27

Step-by-step explanation:

Supplementary angles add up to 180 degrees

65 + 5x - 20 = 180

45 +5x = 180

5x = 135

x = 27

Hi can someone help me with my math homework? I just need help with number c.

Answers

Answer:

Check pdf

Step-by-step explanation:

Answer:

11/4 pints

Step-by-step explanation:

3¹/² pints of blueberries is equal to 7/2 pints

she ate 3/4pints

7/2is equal to 14/4 because we need same denominator

now we subtract

14/4-3/4

=11/4 pints is left

create an expression equal to 49 + 28

Answers

Answer:

55+20

Step-by-step explanation:

The expression equal to 49+28 is (40+9)+(20+8).

What is an expression?

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

The given numerical expression is 49+28.

Here, sum of 49 and 28

49+28=(40+9)+(20+8)

Therefore, the expression equal to 49+28 is (40+9)+(20+8).

To learn more about an expression visit;

https://brainly.com/question/28170201.

#SPJ2

I need help right now, because this is due tomorrow!!!​

Answers

Answer:

1.

mean 13.8 / median 14.5

2.

25.86 / 25

3.

14.43 / 15

4.  

4.875 / 4.5

5.

5.78 / 6

6.

34.11 / 34

7.

28.29 / 28

8.

14.43 / 14

Please Giiive Brillianst!!!!!!!!!!!

URGENT HELP !!!!!! Answer correctly !!!!!!!!!!!! Will be marking brainliest !!!!!!!!!!!!!!

Answers

Answer:

exact: 3 √ 5

decimal: 6.70820393

Step-by-step explanation:

Hope this helps

A DVD has a diameter of 14 centimeters. What is the area of the DVD? Round your answer to the nearest
hundredth. Use 3.14 for it.
The area of the DVD is about
1 cm?

Answers

The answer would be 153.94cm
Formula for the area of a circle is A=pi*r^2
Pi=3.14
R=14/2=7
A=3.14*7^2
A=153.94cm

18. Write an expression to represent the perimeter of the figure below.

Answers

2(x+4)+2(2x-8)
2x+8+4x-16
=6x-8

HELP PLEASE WILL MARK BRAINLIEST!!

Answers

Answer:

Step-by-step explanation:

6 to the 16 power

Help- giving brainliest

Answers

Answer:

The relationship is *11

Step-by-step explanation:

any number times eleven will be a double of itself

for example:

2*11=22

5*11=55

4*11=44

and so on

The total price for a computer and a
printer was $1039. If the computer
cost $750, how much did the printer
cost?

Answers

Answer:

$289

Step-by-step explanation:

If you know the cost of one of the two items, you can subtract that item from the total in order to find the price of the second item

So:   total price - computer price = printer cost

So:   $1039- $750 = $289

The printer is $289

Determine a relationship between the x- and y-values. Write an equation x:1, 2, 3, 4 y:-2, -4, -6, -8

Answers

Answer:

y = 2x + 0

Step-by-step explanation:

Using a linear relationship calculator, where ;

X ____ Y

1 ____ - 2

2 ___ - 4

3 ___ - 6

4 ___ - 8

The equation of line of best fit obtained is :

y = 2x + 0 ;

Where

slope = 2 ; intercept = 0

Cole has 12.4 meters of string. How
many feet of string is this?

Answers

Answer:

so practically, the only thing that we would do would be doing is converting the meters to feet 12.4 meters convert to feet would be 40.6 ft :)

Answer: To be exact, about 40.68241 feet, you can round to the nearest hundredths place to get 40.67

* Countdown
Series 5 / Page 6
Justin has a paper parallelogram with a
lotted line drawn on it. He will use scissors
o cut along the line, forming a triangle and
pentagon
7 cm
8 cm
3 cm
3 cm
Which equation can be used to find p. the
area of the pentagon?
A p= (7 6 / (3.3)
Bp=(7-6)-(3.3)
cp-417.6.3.3)
Dp = (7 + 6) - (3 + 3)

Answers

Answer:

A

Step-by-step explanation:

Area of pentagon = Area of parallelogram - area of triangle

                              = (base * height ) - [tex]\frac{1}{2}*b*h[/tex]

                              = (7 * 6) - [tex]\frac{1}{2}[/tex] * 3 * 3

Microscope slide shows 37 red blood cells out of 60 blood cells how many red blood cells would be expected in a sample of the same blood that has 925 blood cells?

Answers

Answer:

Hope that answers your question

If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?
Oy- (11
y (11)
(18)(5)
oy-
5
11
2 y = (1865

Answers

Answer:

y = 18/5(11)

Step-by-step explanation:

If y varies directly as x, this is expressed as;

y∝x

y = kx

k is the constant of proportional constant

if y = 18 and x = 5

18 = 5k

k = 18/5

to get the expression that can be used to find the value of y when x is 11

y = kx

y = 18/5(11)

This gives the required expression

Jocelyn said that the triangle below is not a right triangle. Her work is shown below. Explain what she did wrong and show Jocelyn the correct solution.

Answers

Complete Question:

Jocelyn said that the triangle below is not a right triangle. Her work is shown below. Explain what she did wrong, and show Jocelyn the correct solution.

We need to check if 27² + 45² = 36² is a true statement. The left side of the equation is equal to 2,754. The right side of the equation is equal to 1,296. That means 272 + 452 = 362 is not true, and the triangle shown is not a right triangle

Answer/Step-by-step explanation:

Jocelyn used a wrong equation and statement.

Here's what she should have stated and done.

Using the converse of Pythagorean Theorem, which says that a triangle with sides a, b, and c is a right triangle if it satisfy the statement: a² + b² = c².

Where, c is the hypotenuse which is the longest leg. While a and b are the side lengths of the other two legs.

Therefore, in this case,

c = 45

b = 27

a = 36

Thus, what we need to check to be true would be:

36² + 27² = 45² (this is where Jocelyn made a mistake. Jocelyn wrote 27² + 45² = 36² rather)

Let's check if it's true.

2,025 = 2,025 (this is true)

Therefore, the triangle is a right triangle.

Factorize (4y-5)²+80y ​

Answers

Answer:

16y^2+40y+25

Step-by-step explanation:

[tex] {16y}^{2} + 40y + 25[/tex]

Step-by-step explanation:

(4y−5)^2+80y

Use binomial theorem (a−b)^2=a^2−2ab+b^2 to expand (4y−5)^2.

16y^2−40y+25+80y

Combine −40y and 80y to get 40y.

16y^2+40y+25

Fill in the blank with the correct word(s) to complete the sentence.


A net is a two-dimensional ______ of a three-dimensional figure.


A.
pattern


B.
length


C.
congruent


D.
height

FREE BRAINLEST GIVEAWAY THE FIRST PERSON TO ANSWER FIRST GETS BRAINLEST! :P

Answers

A. Pattern
This is correct

Answer:

pattern

Step-by-step explanation:

hope it helps............:)

HELPP! BRAINLIEST AND 10 POINTS !!

what is the height of this triangle?

A. 2 units
B. 3 square units
C. 3 units
D. cant be determined

Answers

Answer:

I think it's 3 units so you got that right

Answer:

its the first one

Step-by-step explanation:

A store sells an item for $35 after a 25% markup. What is the price the store paid?
$8.75
$28.00
$43.75
$140.00

Answers

Answer:

The store paid $28.00

Step-by-step explanation:

28 times .25(25%) is 7 and 28+7=35

8- (-7) = help ASAP

Answers

Answer: 15

Step-by-step explanation: have a great day!

The waiting time to ride a roller coaster is 1/3 of an hour when 150 people are in line. How
long is the waiting time when 240 people are in line? Write an equation and solve.

Answers

Answer:

[tex] \frac{66}{125} [/tex]

hours

Hope it helped

PLS mark BRAINLIEST

Reread this sentence from paragraph 7. Click on the
definition that gives the correct connotation of the word strove.

Humans had been instrumental in driving George's
subspecies close to extinction and then strove to do
everything thay could to save it.

A) tried for the first time or began an
attempt

B) tried as an experiment or test to
see what would happen

C) tried with great effort against
difficulties

D) tried in an attempt to prove that
something is true

Answers

Answer:

tried with great effort against difficulties

Step-by-step explanation:

I got it right.

The definition that gives the correct connotation of the word strove will be tried with great effort against difficulties.

What is the meaning of the word strive?

The meaning of the word strive is to make a concerted effort to achieve something or make something happen, especially over a long period of time or in the face of adversity.

Strove is the word used for past incidents. Strive is the present form of the word strove.

The definition that gives the correct annotation of the word strove will be tried with great effort against difficulties.

Hence option C is correct.

To learn more about the strive refer to the link;

https://brainly.com/question/24578751

what does p equal please help me.

Answers

Answer: p < -3/5

Step-by-step explanation:

2p - 4 < -3p - 7

+3p       +3p

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

5p - 4 < -7

     +4   +4

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

5p < -3 (divide by 5)

p < -3/5

Help me out here please, ill give so many points, answer In paper and send a picture of it, thanks.​

Answers

1) 90-27= 63
2)90divide by 3= 30
3)90-40=50
50 divide by 2=25
4)d and f= 57
e=82
5) 74+53=127
180-127=54
6) i=90-64
=26
h=90 (straight line)

if i had 8 cents and i divied it bye 8 how much will it be help

Answers

Answer:

1 simple

Step-by-step explanation:

need help asap will give brainly

Answers

Answer:

false

Step-by-step explanation:

choose as brainlest

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