Please help me with this on the picture

Answer:

30%

Step-by-step explanation:

you just add 10% and 20%

Hope it helps c:

Zelina scored 32% higher on the third quiz than on her first quiz.

The Percentage is defined as representing any number with respect to 100. It is denoted by the sign %.

Given that:-

From the given data we will see that:-

1 ) Zelina scored 10% higher on her second quiz than on her first quiz.

SQ = 1.10 FQ

2 ) On her third quiz, Zelina scored 20% higher than on her second quiz

TQ = 1.20SQ

From the above to expression solve for the first quiz:-

TQ = 1.20 x  1.10 FQ

TQ = 1.32FQ

Therefore Zelina scored 32% higher on the third quiz than on her first quiz.

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Answer:

it have to be letter c

Step-by-step explanation:

this the only problem matches with the question

The inequality represent the given phrase is 2x-11≤20+x. Therefore, option D is the correct answer.

Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

Given that, the difference of twice a number, x, and eleven is, at most, the sum of twenty and a number, x.

The difference of twice a number, x, and eleven is

2x-11

The sum of twenty and a number, x

20+x

So, inequality is 2x-11≤20+x

The inequality represent the given phrase is 2x-11≤20+x. Therefore, option D is the correct answer.

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(B)

Step-by-step explanation:

Rewrite the equations into their standard forms. The first one can be rewritten as

[tex]10x - 12y = -5[/tex]

and the 2nd can be rewritten as

[tex]3x + 5y = -1[/tex]

Solving this system either by substitution or elimination, we get

[tex]x = -\dfrac{37}{86}\:\:\text{and}\:\:y= \dfrac{25}{86}[/tex]

If you add x + y, you'll get a negative number.

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Answer:

  B. x + y < 0

Step-by-step explanation:

The two equations can be cleared of fractions by multiplying by 15.

  15(2/3(x +1) -4/5y) = 15(1/3)

  10(x +1) -12y = 5

  10x -12y = -5

and

  15(2/5x +1/3(2y +1)) = 15(1/5)

  6x +5(2y +1) = 3

  6x +10y = -2

  3x +5y = -1 . . . . . eliminate common factor of 2

__

You can find the solutions any way you like, but you can answer the question without doing that. The lines are not parallel, nor coincident, so there is exactly one solution. (choices C and D are incorrect)

If we can locate the solution relative to the line x + y = 0, we can tell if choice A or choice B is correct. A quick look at the intercepts of the equations tells us the solution cannot lie in quadrants 1 or 4. The negative y-intercept and shallow slope (-3/5) of the second equation tells us the solution must lie below the line x + y = 0. That means x+y < 0, choice B.

_____

In the attached graph, the line x+y=0 is dashed orange. Above that line, x+y>0; below that line, x+y<0. We see the intersection point of the red and blue lines is in the region where x+y < 0.

For standard form equation ax+by = c, the x- and y-intercepts are c/a and c/b, respectively, so are easy to find from that form. Knowing these makes it easy to make a sketch of the graph, locating the solution point relative to the line x+y = 0.

Answer:

Option C.

(3x² + 4x– 7)(x) + (3x² + 4x– 7)(–2)

Step-by-step explanation:

From the question given above, we obtained:

3x² + 4x– 7

x – 2

To know which option is correct, we shall obtained the product of the expression. The product of the expression can be obtained as follow:

(3x² + 4x– 7) (x – 2)

NOTE: (3x² + 4x– 7) will be multiplied by x and –2 as illustrated below:

x(3x² + 4x– 7) – 2(3x² + 4x– 7)

Rearrange

(3x² + 4x– 7)(x) + (3x² + 4x– 7)(–2)

Thus, Option C gives the correct answer to the question.

Answer:

1.944 ;

0.026

Step-by-step explanation:

Given :

Sample size, n = 34

Sample mean, xbar = 15

Population standard deviation, σ = 3

The hypothesis :

H0: μ ≤ 14

H1: μ > 14

The test statistic :

Test statistic = (xbar - μ) ÷ (σ/√(n))

Test statistic = (15 - 14) ÷ (3/√(34))

Test statistic = 1 / 0.5144957

Test statistic, Z = 1.944

The Pvalue :

Using the Pvalue from test statistic value :

Pvalue(1.944) = 0.026

Pvalue < α ; Reject H0

Answer:

Use this formula: length + length + width + width = perimeter

Step-by-step explanation:

If one ball is selected at random, the odds for it being striped are 7 out of 15, or 7/15.

What do we know?

We know that there are 15 billiard balls.

We also know that balls numbered 1 through 8 are solid-colored, so we have 8 solid-colored balls.

And the other 7 balls are striped.

Now we want to find the probability for a randomly selected ball to be a striped ball.

Because all the balls have the same probability of being randomly selected, the probability of randomly selecting a striped ball is equal to the quotient between the number of striped balls (7) and the total number of balls (15).

Then we have:

P = 7/15 = 0.467

That quotient is also what is called the "odds"

So if one ball is selected at random, the odds for it being striped are 7 out of 15, or 7/15.

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Answer:

I believe it's A

Step-by-step explanation:

I'm not sure sorry if its wrong

Answer:

1 / 27 is the answer

Step-by-step explanation:

3^-3

= 1 / 3^3

= 1 / 27

Answer:

80 cm^2

Step-by-step explanation:

Let the width of the rectangle equal x. This means the length is x + 2, as it is 2 cm longer than the width. The formula for perimeter is: P = 2l + 2w, and substitute in the values of the length, width, and perimeter:

P = 2l + 2w

36 = 2(x + 2) + 2(x)

36 = 2x + 4 + 2x

36 = 4x + 4

4x = 32

x = 8

x represents the width, so the width is 8 and the length is 10. Area is length times width, so the area is 8 x 10 or 80 cm^2.

Step-by-step explanation:

let x be the width

p=2l+2w

36=2(2)+2(x)

36=4+2x

36-4=2x

32/2=2x/2(simplify)

x=16

therefore the width is 16cm

area of the rectangle is l×w

=2×16

=32cm"

therefore the area is 32cm"

Answer:

i think 5 points home run will be on his fifth at bat . 10 point isthe expected number of at bats until the next home rum.

Answer:

1) x+y=-2

x=-2-y

2) x-y=-8

substitude value of x

(-2-y)-y=-8

-2-2y=-8

-2y=-6

y=3

Substitute value of y in 1

x=-2-3

x=-5

Brainliest please~

Answer:

c. When gives tow names for the same quantity, you can use algebra to solve the equation.

Hope it help you

The system of linear inequalities are given by the in the question, that

describes the inequalities.

The system of linear inequalities represented by the graph is the option;

Reasons:

The points on the given graph are;

(3, 4), and (-3, 2)

The slope is; (2 - 4)÷((-3) - 3) = 1/3

The equation is;

y - 4 = (1/3)·(x - 3)

y = (1/3)·x - 1 + 4 = (1/3)·x + 3

Therefore;

Point on the second graph are;

(0, -2) and (2, 4)

The slope is; (4 - (-2)) ÷ (2 - 0) = 3

The equation is; y - (-2) = 3·(x - 0)

y = 3·x - 2

Which gives;

2 < 3·x - y

Therefore;

3·x - y > 2

The correct option is the first option;

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Convert the mixed number to inches. 3 feet 8 inches = 44 inches (12 inches per foot x 3 feet= 36 inches + 8 inches= 44 inches). 44 inches (length each section needs to be) x 4 (number of sections needed)=176 inches (total molding needed). To determine the amount of molding needed in feet, convert 176 inches into feet by dividing 176 inches by 12 inches. You get 14 2/3 feet, so the shortest board length is 15 feet.

There is total 12 inches in one feet. The length of the board man must buy is equal to 14 feet.

There is total 12 inches in one feet.

Given information-

The total number of section has to be cut is 3.

The length of each section is 4 feet 8 inches.

There is total 12 inches in one feet. Thus the number of inches in 4 feet is,

[tex]\rm in=4\times12\\\rm in=48[/tex]

Thus the total inches in the 4 feet is 48.

The length of each section is 4 feet 8 inches. The total inches in the 4 feet and 8 inches is,

[tex]\rm in=48+8\\\rm in=56[/tex]

Thus the length of each section is 56 inches.

Now the total 3 section 56 inches required from a whole board. Thus the board should 3 times the 56 inches.

Suppose the length of the board is x. Thus,

[tex]x=56\tiems3\\x=168[/tex]

Thus the length of the board is 168 inches. Convert this into the feet by dividing with number 12.

[tex]x=\dfrac{168}{12} \\x=14[/tex]

Hence the length of the board man must buy is equal to 14 feet.

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Answer:

[tex]{ \bf{ log_{a}(U) = x}} \\ { \boxed{ \tt{ {a}^{x} = U}}} \\ \\ { \bf{ log_{a}(V) = y}} \\ { \boxed{ \tt{ {a}^{y} = V }}}[/tex]

Answer:

x<12

Step-by-step explanation:

5(x+5) < 85

Divide each side by 5

5(x+5) /5 < 85/5

x+5 < 17

Subtract 5 from each side

x+5-5 < 17-5

x<12

Answer:

x<12

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

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Answer:

  f(x) = -4(x +7)(x +1)

Step-by-step explanation:

The x-intercepts tell us that m=-7 and n=-1. We can use the given point to find 'a'.

  f(-4) = 36

  a(-4+7)(-4+1) = 36

  a = 36/-9 = -4 . . . . divide by the coefficient of 'a'

Filling in the known values, ...

  f(x) = -4(x +7)(x +1)

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Answer:

  A, D, F

Step-by-step explanation:

A: true

B: false; it is positive

C: false; it may be positive: -1 -(-2) = +1

D: true, a variation of A

E: false; for c < 0, the inequality symbol reverses

F: true. This is the definition of an additive inverse.

G: false; multiplying anything by zero gives zero

H: false; -(-1) = +1, not a negative

Answer:

An airline estimates that 94% of people booked on their flights actually show up. If the airline books 77 people on the flight for which the maximum number is 75, what is the probability that the number of people who show up will exceed the capacity of the plane?

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

Binomial Problem with n = 77 and p = 0.94

---

P(76 <= x <= 77) = 1-P(0 <=x <= 75) = 1 - binomcdf(77,0.94,75) = 0.0504

==================

Cheers,

Stan H.

9514 1404 393

Answer:

  (c)  (4, 3)

Step-by-step explanation:

The next step in the solution of System B is to divide by 15 1/2. This will result in the equation ...

  x = 4

The only answer choice that has x = 4 is the ordered pair (4, 3). That ordered pair is the solution to the system.

__

  (15 1/2)x = 62   ⇒   (31/2)x = 124/2   ⇒   x = (124/2)/(31/2) = 124/31 = 4

Answer:

c

Step-by-step explanation:

got it right on the test

Answer:

Mean = 35.56

Median = 35.5

Step-by-step explanation:

Given the data:

16 25 24 19 33 25 34 46 37

33 42 40 37 34 49 73 46 45

Reordered data :

16, 19, 24, 25, 25, 33, 33, 34, 34, 37, 37, 40, 42, 45, 46, 46, 49, 73

The mean = ΣX / n

n = sample size ; ΣX = sum of values

The mean = 658 / 18

The mean = 36.56

The Median = 1/2(n+1)th term

1/2(18+1)th term = 1/2(19)th term = 9.5 term

Median = (9th + 10th) / 2 = (34 + 37) / 2 = 35.5

Answer:

Q = 30

Step-by-step explanation:

Since this is a right triangle we can use trig functions

We know the opposite side and the hypotenuse

sin Q = opp / hypotenuse

sin Q = 7/14

Taking the inverse sin of each side

sin ^-1 (sin Q) = sin ^-1(7/14)

Q =30

Answer:

30 degrees

Step-by-step explanation:

The volume of a rectangle prism is V=whl where w is the width, h is the height, and l is the length. In this case, V=17*15*17, or 4335 cubic inches.

Answer:

∠B= 102°, ∠Y= 32°

Step-by-step explanation:

The sum of the angles in a triangle is 180°.

∠A +∠B +∠C= 180° (∠ sum of triangle)

50° +∠B +28°= 180°

∠B +78°= 180°

∠B= 180° -78°

∠B= 102°

∠X= 180° -100° (adj. ∠s on a str. line)

∠X= 80°

∠X +∠Z +∠Y= 180° (∠ sum of traingle)

80° +68° +∠Y= 180°

∠Y +148°= 180°

∠Y= 180° -148°

∠Y= 32°

Alternatively,

∠Z +∠Y= ∠W (ext. ∠ of triangle)

68° +∠Y= 100°

∠Y= 100° -68°

∠Y= 32°

Answer:

Scores between 71 and 80 give a C grade.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Scores on the test are normally distributed with a mean of 78.8 and a standard deviation of 9.8.

This means that [tex]\mu = 78.8, \sigma = 9.8[/tex]

Find the numerical limits for a C grade.

Above the bottom 20%(20th percentile) and below the top 45%(below the 100 - 45 = 55th percentile).

20th percentile:

X when Z has a p-value of 0.2, so X when Z = -0.84.

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]-0.84 = \frac{X - 78.8}{9.8}[/tex]

[tex]X - 78.8 = -0.84*9.8[/tex]

[tex]X = 70.57[/tex]

So it rounds to 71.

55th percentile:

X when Z has a p-value of 0.55, so X when Z = 0.125.

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]0.125 = \frac{X - 78.8}{9.8}[/tex]

[tex]X - 78.8 = 0.125*9.8[/tex]

[tex]X = 80[/tex]

Scores between 71 and 80 give a C grade.

Answer:$240,000

Step-by-step explanation:

Answer:

What is 75 percent (calculated percentage %) of number 40,000? Answer: 30,000.

Answer:

acute

Step-by-step explanation:

That triangle is an obtuse triangle