Can't figure this out, have been trying for a half hour now.

Answer:

25/16

Step-by-step explanation:

(4/5)^-2

Use Negative Power Rule: x^-a = 1/x^a

1/(4/5)^2

Use Division Distributive Property: (x/y)^a = x^a/y^a

1/16/5^2

1/16/25

25/16

Please mark me the brainliest!?!

Answer:

40/9

Step-by-step explanation:

Use the work formula, [tex]\frac{1}{A}[/tex] + [tex]\frac{1}{B}[/tex] = [tex]\frac{1}{T}[/tex], where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.

Plug in the times for David and Alex alone:

[tex]\frac{1}{10}[/tex] + [tex]\frac{1}{8}[/tex] = [tex]\frac{1}{T}[/tex]

Find the least common denominator, which is 40.

[tex]\frac{4}{40}[/tex] + [tex]\frac{5}{40}[/tex] = [tex]\frac{1}{T}[/tex]

[tex]\frac{9}{40}[/tex] = [tex]\frac{1}{T}[/tex]

Cross multiply and solve for T:

9T = 40

T = 40/9

So, if they worked together, it would take them 40/9 hours

Answer:

40/9

Step-by-step explanation:

just helped my sister with this question.

Answer:

The answer is

[tex] \huge \frac{10}{9} [/tex]

Step-by-step explanation:

The slope of a line given two points can be found by using the formula

[tex]m = \frac{ y_2 - y _ 1}{x_ 2 - x_ 1} \\[/tex]

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(80, -94) and (89, -84)

We have

[tex]m = \frac{ - 84 - - 94}{89 - 80} = \frac{ - 84 + 94}{9} = \frac{10}{9} \\ [/tex]

We have the final answer as

[tex] \frac{10}{9} \\ [/tex]

Hope this helps you

Answer:10/9

Step-by-step explanation:

Answer:

130% increase

Step-by-step explanation:

Answer:

D=(6T)+(9R)

Step-by-step explanation:

Since she runs 6mph and bikes 9mph, the distance she covers can be described as D=(6T)+(9R).

Answer:

E = 20h, she earns $300 for 15 hours

Answer:

Slope (m) = tanθ

=tan60

=√3

Hence the slope is √3

I think it will help you

Answer: If you substitute the x for 3, and multiply 4 times 3, you’ll get 12 and then you subtract 9 from 12 and then you’ll get 3. I’m pretty sure y=3

Step-by-step explanation:

Answer: 24

Step 1: Subtract 7 because Norachai has seven more lollipops.

55 - 7 = 48.

Step 2: Divide 48 by 2 because he gave every student two lollipops.

48 divided by 2 = 24.

Answer = 24

Answer:

54 ft squared

Step-by-step explanation:

To find surface area l*w

9*6=54 ft squared

Answer: 2

Step-by-step explanation:

Slope=rise/run

In this case

Rise=2

Run=1

2/1=2

Answer: m = 2

Step-by-step explanation:

1) m= (y2-y1)/(x2-x1)

2) let say :

y1=0

y2=4

x1=-2

x2=0

3) m= (4-0)/(0-(-2))

4) m= 4/2 =2

Answer:

58.50

Step-by-step explanation:

Multiply 50 and .17 which equals 8.5 then add that to 50.

The amount of money in the account in December with a rate of 17% of the initial amount of $50 is $58.5.

The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.

A teenager puts $50 into an investment account in January.

Let, he deposited on first January.

If by December the balance in the account increases by 17%,

Let the amount by the 31 first of December will be

Then the amount will be given as

[tex]A = P (1 + \dfrac{r}{100})^t[/tex]

P = $50

r = 17%

t = 1

Then we have

[tex]\rm A = 50(1 + \dfrac{17}{100})^1\\\\A = 50(1 + 0.17)\\\\A = 50 * 1.17 \\\\A = 58.5[/tex]

More about the percentage link is given below.

https://brainly.com/question/8011401

Answer:

  (B)  a = $0.50, b = $0.25

Step-by-step explanation:

Answer choice B is the only one in which an apple costs twice as much as a banana.

__

It helps to see if the answer choices match the requirements of the problem statement.

Answer:

x=11

x=−5

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :  6*x+55-(x^2)=0

 -x2+6x+55  =0

According to the Quadratic Formula,  x  , the solution for   Ax2+Bx+C  = 0  , where  A, B  and  C  are numbers, often called coefficients, is given by :

           - B  ±  √ B2-4AC

 x =   ————————

                     2A

 In our case,  A   =     -1

                     B   =    6

                     C   =   55

Accordingly,  B2  -  4AC   =

                    36 - (-220) =

                    256

Applying the quadratic formula :

              -6 ± √ 256

  x  =    ——————

                     -2

Can  √ 256 be simplified ?

Yes!   The prime factorization of  256   is

  2•2•2•2•2•2•2•2  

To be able to remove something from under the radical, there have to be  2  instances of it (because we are taking a square i.e. second root).

√ 256   =  √ 2•2•2•2•2•2•2•2   =2•2•2•2•√ 1   =

               ±  16 • √ 1   =

               ±  16

So now we are looking at:

          x  =  ( -6 ± 16) / -2

Two real solutions:

x =(-6+√256)/-2=3-8= -5.000

or:

x =(-6-√256)/-2=3+8= 11.000

Answer:

(x-3)^2 =64

x=3 plus or minus 8

Step-by-step explanation:

I got it right on khan

Answer:

1.[tex]\:\left(-\infty \:,\:1\right)[/tex]
2.[tex]\:[11,\:\infty \:)[/tex]

Step-by-step explanation:

Given the following questions:

[tex]x-5 < -4[/tex]
[tex]-7x+6\leq-71[/tex]

To find the answer we solve as if it is a two-step equation where we add/subtract on both sides.

Question one:
[tex]x-5 < -4[/tex]
[tex]-5+5=0[/tex]
[tex]-4+5=1[/tex]
[tex]x < 1[/tex]
[tex]\:\left(-\infty \:,\:1\right)[/tex]

Question two:
[tex]-7x+6\leq-71[/tex]
[tex]6-6=0[/tex]
[tex]-71+-6=-77[/tex]
[tex]-7x\leq-77[/tex]
[tex]-7x\div-7=x[/tex]
[tex]-77\div-7=11[/tex]
[tex]x\leq11[/tex]
[tex]\:[11,\:\infty \:)[/tex]

Which means your answers are "(-∞, 1) and [11, ∞)."

Hope this helps.

Answer:

64

Step-by-step explanation:

100-6^2

6^2=36

100-36=64

Hope this helps :)

Answer:

1.A

-$92

-$212

1.B

To solve this you set up the equation:  x(8) +12 =y. In this equation x=, the number of paintbrushes and y=, the total cost of the purchase. If you plug in the number of paintbrushes that are being bought you should be able to get your Y(total cost).

Hope this helped!

Answer: x = 52.1 degrees

Step-by-step explanation:

The tangent of an angle is the opposite side divided by the adjacent side.

Therefore, tan(x) = 45/35.

We can find thte value of x by doing the arc tangent of 45/35, which makes x about 52.1 degrees.

Answer:

i think it will weigh 8 ounces

Step-by-step explanation:

if one can plus it is equal to 2 itll will be balenced

Answer:

c

Step-by-step explanation:

Answer:

the highest common factor of 25 and 35 is 5

so,

5(5y-7z) is the factorise form of 25y-35z

Step-by-step explanation:

hope this helps you!!

Answer:

A.) x < 3

Step-by-step explanation:

I jus got 100% on the quiz.

Answer:

two x plus three is less than twenty-three

Step-by-step explanation:

im not sure but I think that's how you do it

Answer:

Step-by-step explanation:

Answer:I’m guessing you meant cm for 112 so..

Step-by-step explanation:250-112=138

so 250-138=112

Answer:

100 cm

Step-by-step explanation:

112*2 then you divide & get 100

0000.3

Step-by-step explanation:

because I need points lolol

It is B :)

Step-by-step explanation: