Need help combining like terms!! PLS

Answer:

15/17

Step-by-step explanation:

You can calculate cosine by doing adjacent / hypotenuse so cos x° = 15/17.

Answer:

a=129

Step-by-step explanation:

the angles are complementary which is is 180

51+a=180

a=180-51

a=129

Answer:

Yes

Step-by-step explanation:

You can take 1/2 and find a common denominator if this helps you.

We will multiply 1/2 by 25/25 because 25/25 equals 1 so you get the same amount just with a different numerator and denominator. So you get 25/50 and then you compare. 31/50 > 25/50

Answer:

A, B, C

Step-by-step explanation:

Answer:

A) Lands on blue 43 times

B) Lands on yellow 8 times

C) Lands on red 33 times

Step-by-step explanation:

Blue is 1/2 of the spinner so theoretically is should be landed on 1/2 of the time which is 40/80 but experimentally, it can differ slightly. Using this same logic, it can be applied to yellow and red. Yellow is 1/8 of the spinner so it should be landed on about 10 out of the 80 times. Red is 3/8 of the spinner so it should be landed on approximately 30 out of 80 times.

Answer:

21/140, 22/140, 23/140, 24/140

Step-by-step explanation

7 and 5 have a common multiple of 140.

140/7 = 20 , 20/140

140/5 = 28, 28/140

21, 22, 23, 24, 25, 26, and 27 are all numbers between 20 and 28.

Answer:

q(-1)=-2

Step-by-step explanation:

1) flip the equation:

4x+7=-1

2) subtract 7 from both sides:

4x=-8

3) divide both sides by 4:

x=-2

HOPE THIS HELPS!!!! :)

Answer:

Mr. Wilson invested $ 2,000 in the 12% simple interest account and $ 6,000 in the 6% simple interest account.

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of the investment = $ 8,000  

Interest rate of the first account= 6% simple  

Interest rate of the second account= 12% simple  

Interest of the accounts in a year = $ 600  

2. How much did he invest in each account?

For answering the question, we will use the following equation:  

x = Amount invested in the first account  

8,000 - x = Amount invested in the second account  

0.06x + 0.12 * (8,000 - x) = 600

0.06x + 960 - 0.12x = 600

-0.06x = 600 - 960 (Subtracting 960 at both sides)

-0.06x = -360

x = -360/-0.06

x = 6,000 ⇒ 8,000 - x = 2,000  

Mr. Wilson invested $ 2,000 in the 12% simple interest account and $ 6,000 in the 6% simple interest account.

Answer:

40 mL of vinegar,

280 mL of dressing

Step-by-step explanation:

Let v = the milliliters ( mL ) of 100% vinegar,

Then it should be that 320 - v = mL of dressing.

v + .12( 320 - v ) = .23( 320 ) - So in this case the mL of vinegar is associated with the percent of vinegar composed. 100 percent is, in other words, 1, and is multiplied by " v " the mL of 100% vinegar. 1 [tex]*[/tex] v is also v, and so is written as such in our equation. 0.12 is the decimal form of the 12% vinegar, associated with the mL of dressing - as the italian dressing is composed of 12% vinegar. 23% is 0.23 in decimal form, multiplied by the mL of of vinegar in the mixture, 320 mL.

Let's solve for the mL of 100% vinegar, subtracting from 320 to receive the mL of dressing,

v + .12( 320 - v ) = .23( 320 ) - Distribute " .12 "

v + 38.4 - 0.12v = .23( 320 ) - Multiply " 0.32 " by " 320 "

v + 38.4 - 0.12v = 73.6 - Combine like terms and add / subtract

0.88v = 35.2 - Divide 0.88 on either side

v = 40 mL of vinegar,

320 - v = 320 - 40 = 280 mL of dressing

Answer:

1/8

Step-by-step explanation:

ok so before i start i wanna say that this is gonna get confusing.....

Since the pizza is a whole quantity let us take it as 1.

Harry ate half of the pizza therefore the fraction that Harry ate = 1/2 of 1

= 1/2 × 1 = 1/2

Therefore fraction Harry ate = 1/2

Fraction of pizza left = 1 - 1/2 (LCM = 2)

= 1/2

Jacqueline ate 1/2 of what was left.

So, Fraction of pizza Jacqueline ate = 1/2 × 1/2 = 1/4

Therefore fraction of pizza left after both Harry and Jacqueline ate =

1 - (1/2 +1/4) = 1 - 3/4 (LCM = 4) = 1/4

Therfore fraction of pizza left = 1/4

Stanley ate 1/2 of what was left.

So, fraction of pizza Stanley ate = 1/2 × 1/4 = 1/8

Therefore, fraction of pizza left after all three of them ate =

1 - (1/2 + 1/4 + 1/8) = 1 - 7/8 (LCM = 8) = 1/8

I hope this helps .......i know this is rlly confusing but i dont know how else to put it : )

Have a nice day!      

Answer:

677,727,284,640,775 ?

Answer:

A) (-4,-1)

Step-by-step explanation:

a line graphed with those coordinates would have a slope of -3/12, or -1/4.

Following that slope, you would go through (-4,-1).  So that is the point collinear with the given points.

Answer:

x = [tex]\frac{k(a+r)}{7}[/tex]

Step-by-step explanation:

Given

a = [tex]\frac{7x}{k}[/tex] - r ( add r to both sides )

a + r = [tex]\frac{7x}{k}[/tex] ( multiply both sides by k to clear the fraction )

k(a + r) = 7x ( divide both sides by 7 )

[tex]\frac{k(a+r)}{7}[/tex] = x

Answer:

        ak - kr                 k(a - r)

x = --------------  or  x = ------------

             7                          7

Step-by-step explanation:

1. Multiply all three terms by k to eliminate the fraction:

ak = 7x - kr

2.  Subtract kr from both sides:

7x = ak - kr

3.  Divide both sides by 7:

        ak - kr                 k(a - r)

x = --------------  or  x = ------------

             7                          7

Greetings from Brasil...

The equation:

X² + 4X + 1 = - 3

X² + 4X + 1 + 3 = 0

X² + 4X + 4 = 0

Δ = b² - 4.a.c

Δ = 4² - 4.1.4

Δ = 0

so we have just 1 solution

X = (- b ± √Δ)2a

X = (- 4 ± √0)2.1

X = - 4/2

Answer:

X=-2

Step-by-step explanation:

Use more than one equation.

X=-2

X=2

minus the four from the left over.

answer X=-2

Answer:

(x-1)(x+1)(x+2)

Step-by-step explanation:

X³+2x²-x-2

(X-1)(x²+3x+2)

(x-1)(x+1)(x+2)

Answer:

perimeter of a cuboid is 4(L+B+H).

so, L=1m, B=0.4m,H=0.8m

substituting by formula,

4(1+0.4+0.8)

= 4(2.2)

=8.8

AMOUNT OF SCREEN THAT ALICE REQUIRES FOR HER HABITAT IS 8.8m

Step-by-step explanation:

HOPE IT HELPS. PLEASE MARK IT AS BRAINLIEST

Answer:

3.04 m^2

Step-by-step explanation:

Answer:

x = -4 , -2

Step-by-step explanation:

I am assuming "x2" is x^2. If the equation is x^2 + 6x + 8 = 0, then you first have to factor the equation x^2 + 6 + 8.

In order to do that, you would have to find the multiples of 1 (from x) and 8.

We can see that 1 * 1 is 1, so that is the only pair that would work for the problem. 4 * 2 is 8, but 8 * 1 is also 8. So, which set of numbers do we have to choose? It's actually really simple. You multiply the first set of numbers (1 and 1) with one of the sets from 8 ( 4 and 2 or 8 and 1). Then when you are finished multiplying them together, you add them together to see if they equal to the number in the middle (6x). So 1(x) * 4 is 4x, and 1(x) * 2 is 2x, and when we add the numbers together, we get 6x, which is the middle number, so therefore, 4 and 2 is the correct set of numbers, not 8 and 1, because if we multiply and add those together, we get 7x, not 6x.

After doing that, you have to put them like this:

(x + 4)(x + 2)

This is so when you multiply them together, you get the starting equation. But we have to solve for x. In order to do that, we have to plug that into the equation we started off with.

(x + 4)(x + 2)=0

Now we have to make x + 4 and x + 2 equal to 0, so x is -4 and -2. There are two correct answers. Hope this helps :)

Answer:

x is -2 and -4

Answer:

12.895

Step-by-step explanation:

Standard deviation is a statistic that measures the dispersion of a sample. The sample standard deviation measures the spread of data distribution of the sample. It is usually used to estimate the population standard deviation.

The first set of data shows that the difference in the prices is very small while the second set of data shows a larger variety of prices. The first set represents its prices in equally divided groups making it easier to read and determine than the second set of data.

Answer:

3.2 matches with (A) -3.3

-2.3 matches with (C) 2.3

-1.5 matches with (B) 1.5

5.1 matches with (D) -5.1

Answer:it is a location

Step-by-step explanation:

The others are simply wrong

The statement that can be said to be through about point is that a point is a location.

                   A point is a location in a geometry space used in demarcating an area or region with a dot representation. It does not have any long line or an endpoint. It does not also have a length or width. It is usually used to make a notion about a specified region.

For example:  If I want to measure a distance of 6 cm. I can place my divider from the mathematical set on the meter-rule and measure out 6 cm.

Then, place 6 cm on the plain sheet to show two different dots indicating the distance of 6cm before I draw the distance of 6cm with my drawing pencil.

Learn more about a point here:

https://brainly.com/question/22932149?referrer=searchResults

Answer:

D. -1,-2,-4,-8

Step-by-step explanation:

An arithmetic sequence means that there is a pattern between the numbers that is constant, that deals with either adding or subtracting.

The last sequence here, is not arithmetic because it is being multiplied by 2 every time.

Answer:

the first choice

Step-by-step explanation:

0.25= 0.25

2/3= 0.3333333

56%= 0.56

0.25<0.33<0.56

Answer:

Step-by-step explanation:

√x² + 49 = x + 5

Square both sides

(√x² + 49)² = ( x + 5)²

x² + 49 = x² + 10x + 25

Simplify

10x = 49 - 25

10x = 24

Divide both sides by 10

Hope this helps you

Answer: 4

Step-by-step explanation:

Given the following :

P = probability of success = 0.5

n = number of trials = 8

The expected value of a binomial distribution with probability of success P and number of trials n is defined by:

E(n, p) = n * p

Therefore, expected value when P = 0.5 and n = 8

E(8, 0.5) = 8 × 0.5

= 4

The expected value of the binomial distribution is 4

Answer:

[tex]f(x) = (\frac{1}{5})^{-x}[/tex]

Step-by-step explanation:

Given

The graph above

Required

Determine from the list of options, the function of the graph

To determine the function, we have to test each of the options

But first, we nees to write out the points on the graph

(1,5), (0,1), (-1,1/5) and (-2, 1/25)

A. [tex]f(x) = (\frac{1}{5})^x[/tex]

Point 1: When x = 1, f(x) = 5

[tex]f(x) = (\frac{1}{5})^x[/tex]

[tex]f(1) = (\frac{1}{5})^1[/tex]

[tex]f(1) = (\frac{1}{5})[/tex]

There's no need to check further as the first point doesn't lie on the graph

B.  [tex]f(x) = (\frac{1}{5})^{-x}[/tex]

Point 1: When x = 1, f(x) = 5

[tex]f(x) = (\frac{1}{5})^{-x}[/tex]

[tex]f(1) = (\frac{1}{5})^{-1}[/tex]

[tex]f(1) = 1/(\frac{1}{5})[/tex] --- Law of indices

[tex]f(1) = 1*(\frac{5}{1})[/tex]

[tex]f(1) = 1*5[/tex]

[tex]f(1) = 5[/tex]

Point 2: When x = 0, f(x) = 1

[tex]f(0) = (\frac{1}{5})^{-0}[/tex]

[tex]f(0) = (\frac{1}{5})^{0}[/tex]

[tex]f(0) = 1[/tex] --- The expression raise to power 0 is 1

Point 3: When x = -1, x = 1/5

[tex]f(x) = (\frac{1}{5})^{-x}[/tex]

[tex]f(-1) = (\frac{1}{5})^{-(-1)}[/tex]

[tex]f(-1) = (\frac{1}{5})^{1}[/tex] ----- Law of indices

[tex]f(-1) = (\frac{1}{5})[/tex]

Point 4: When x = -2, x = 1/25

[tex]f(x) = (\frac{1}{5})^{-x}[/tex]

[tex]f(-2) = (\frac{1}{5})^{-(-2)}[/tex]

[tex]f(-2) = (\frac{1}{5})^{2}[/tex] ----- Law of indices

[tex]f(-2) = \frac{1}{5} * \frac{1}{5}[/tex]

[tex]f(-2) = \frac{1}{25}[/tex]

There's no need to check other options as this function satisfy the 4 points on the graph;

Hence;

[tex]f(x) = (\frac{1}{5})^{-x}[/tex] is the exponential function represented on the graph

Answer:

y = 1.5x.

Step-by-step explanation:

2 yellow (x)  3 red (y)   (3 /2 = 1.5)

3 yellow 4.5 red      (1.5)

4 yellow 6 red         (1.5)

6 yellow 9 red         (1.5)

So the equation is

y = 1.5x

Answer:

The mean boiling temperature of the tap water is 2°C less than hat of the mixture of salt water.

Step-by-step explanation:

The complete question is attached below.

From the provided data it can be seen that the distributions of boiling  temperatures, in degrees Celsius, of both tap water and a  mixture of salt water are approximately symmetric.

It is known that, for a symmetric distribution,

Mean = Median = Mode

The median for the two distributions are:

Median (Tap water) = 100°C

Median (Mixture of salt water) = 102°C

Then the mean for the two distributions would be:

Mean (Tap water) = 100°C

Mean (Mixture of salt water) = 102°C

So, the mean boiling temperature of the tap water is 2°C less than hat of the mixture of salt water.

Answer: It's B :)

Step-by-step explanation:

Answer: c ax + b = ax+ b

Step-by-step explanation: Seems like a trick question, especially since Answer c has no c in the equation. But once you put in numbers for a,b,and c, there cannot be infinite solutions for x in the first two examples.

Set up two or three equations and test them as proof.