Help pls I don’t get this

Answer:

Natalie is 13 years old, while Fred is 28 years old.

Step-by-step explanation:

Given that if you add Natalie’s age and Fred’s age, the result is 41, and if you add Fred’s age to 3 times Natalie’s age, the result is 67, to find how old Fred and Natalie are, the following calculation must be performed:

N + F = 41

3N + F = 67

(67 - 41) / 2 = N

26/2 = N

13 = N

13 x 3 + F = 67

39 + F = 67

F = 67 - 39

F = 28

28 + 13 = 41

Therefore, Natalie is 13 years old, while Fred is 28 years old.

Answer:

B

Step-by-step explanation:

y-intercept is where x is zero, so we must look at where the y-iterceot is crossed

Answer:

options pls. or any image.......................................

The distance between two points is √29 unit.

The relationship between the three sides of a right-angled triangle is explained by the Pythagoras theorem, also known as the Pythagorean theorem. The Pythagorean theorem states that the square of a triangle's hypotenuse is equal to the sum of its other two sides' squares.

We have the points (-2, 3) and (3, 1).

Using Distance formula

= √(1-3)² + (3 - (-2))²

= √ (-2)² + (5)²

= √ 4 + 25

= √29 unit

Thus, the distance between two points is √29 unit.

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Answer:

[tex]y = \frac{384}{9}[/tex]

Step-by-step explanation:

Given

[tex]y\ \alpha\ x^2[/tex] --- direct variation

[tex](x,y) = (3,24)[/tex]

Required

y when x = 4

[tex]y\ \alpha\ x^2[/tex]

Express as an equation

[tex]y = kx^2[/tex]

Substitute: [tex](x,y) = (3,24)[/tex]

[tex]24 = k*3^2[/tex]

[tex]24 = k*9[/tex]

Solve for k

[tex]k = \frac{24}{9}[/tex]

To solve for y when x = 4, we have:

[tex]y = kx^2[/tex]

[tex]y = \frac{24}{9} * 4^2[/tex]

[tex]y = \frac{24}{9} * 16[/tex]

[tex]y = \frac{24 * 16}{9}[/tex]

[tex]y = \frac{384}{9}[/tex]

Answer:

C

Step-by-step explanation:

The answer is c because when 2, -1 is plugged into the equation, you get

.5(2) - 2(-1) >/= 3

when solved -

1 + 2 >/= 3 -

3 >/= 3

and this is in the solution set because three is equal than or greater to three

Answer:

Step-by-step explanation:

the 1st and 2nd b/c they are both square the input number  

The Answer Is 18

Order Of Operation laws says that you must do the parentheses first, 45x2.

45x2=90

The next thing you must do is divide 90 by 10 since division is before addition.

90/10=9

Now combine like terms.

9+9=18

Answer:

2496 cm sq.

Step-by-step explanation:

Length equals 52cm and Perimeter is 200cm.

Area = Length x Breadth (or Width).

To find the area we have to first find the breadth.

2 x (Length + Breadth) = Perimeter.

Substituting what's given in the question, we get:-

2 x ( 52 + Breadth) = 200

52 + Breadth = [tex]\frac{200}{2}[/tex]

52 + Breadth = 100

Breadth = 100 - 52

Breadth = 48cm.

So, Area equals-------->

Length x Breadth

= 52 x 48

Area = 2496 cm sq.

Answer:

Area:

4 x 4 = 16

Finding area of semi circle:

4 is your diameter so half of it is your radius which is 2 since half of 4 is 2!

2^2<---your radius being squared = 4

4(radius squared) x 3.14(pi) = 12.56

12.56 divided by 2 since its a semi circle is = 6.28

6.28 + 16 = 22.28 is your area

Perimeter is:

4 + 4 + 4 (all sides of a square are equal therefore one or two given lengths will be all the sides) = 12

Circumference:

Radius is 2,

2(you just always have to multiply this number when finding circumference) x 3.14(pi) x 2(radius), 2 x 3.14 x 2 = 12.56

12.56 divided by 2 = 6.28

6.28 + 12 = 18.28 is your perimeter.

Just a refresh:

Circumference Formula:

2(always use this number when finding circumference) x pi(3.14 or 22/7 depending on what they tell you to use for pi) x radius

Area of a Circle Formula:

Radius squared x pi(3.14 or 22/7 whatever they tell you to use for pi)

Another thing you should remember:

Whenever it gives you 1/4 of a circle or 1/3 or a semi circle or any fraction, REMEMBER TO DIVIDE BY THAT DENOMINATOR TO WHAT YOU GET FROM EITHER CIRCUMFERENCE OR AREA OF A CIRCLE!

Answer:

The p-value for the one-sided Hypothesis test described in this example is 0.3121.

Step-by-step explanation:

Test the hypothesis that more than 50% of people plan on voting for the levy.

At the null hypothesis, we test that the proportion is 50%, that is:

[tex]H_0: p = 0.5[/tex]

At the alternate hypothesis, we test if this proportion is above 50%, that is:

[tex]H_a: p > 0.5[/tex]

The test statistic is:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

0.5 is tested at the null hypothesis:

This means that [tex]\mu = 0.5, \sigma = \sqrt{0.5*0.5} = 0.5[/tex]

Of these 150 respondents, 78 people say they plan on voting for the levy.

This means that [tex]n = 150, X = \frac{78}{150} = 0.52[/tex]

Value of the test statistic:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]z = \frac{0.52 - 0.5}{\frac{0.5}{\sqrt{150}}}[/tex]

[tex]z = 0.49[/tex]

Pvalue of the test:

The pvalue of the test is the probability of finding a proportion above 0.52, which is 1 subtracted by the pvalue of z = 0.49.

Looking at the z-table, z = 0.49 has a pvalue of 0.6879.

1 - 0.6879 = 0.3121

The p-value for the one-sided Hypothesis test described in this example is 0.3121.

Answer:

[tex]n \leqslant 4[/tex]

Step-by-step explanation:

[tex] - 3n - 5 \geqslant - 17[/tex]

[tex] - 3n \geqslant - 12[/tex]

[tex] \frac{ - 3n}{ - 3} \leqslant \frac{ - 12}{ - 4} [/tex]

[tex]n \leqslant 4[/tex]

Answer: 290 miles

Step-by-step explanation:

Given

Allison drove with a speed of 58 mph

Austin drove with a speed of 40 mph

If both start at the same time

suppose Allison takes t hours to reach the destination. So, the difference between the distance traveled in t hours is 90 miles

[tex]\Rightarrow 58t-40t=90\\\Rightarrow 18t=90\\\Rightarrow t=5\ hr[/tex]

Distance traveled by Allison is [tex]58\times 5=290\ miles[/tex]

Answer: The mode is 12

Step-by-step explanation: It is the most common number in the data set.

Answer: 11.2$

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

Hello!

Here are the coordinates and a picture example!

Original coordinates: -3, -5

New coordinates: 3, -5

Hope that helps!

Answer:

C. 162.5 sq ft.

Step-by-step explanation:

Given the following data;

S.A of smaller cylinder, S1 = 65 ft²

Ratio = 2:5 = 2 + 5 = 7

Let the total surface area be x.

S1 = 2/7 * x = 65

S1 = 2x = 65 * 7

S1 = 2x = 455

x = 455/2

x = 227.5 ft²

To find the surface area of the larger cylinder;

S2 = 5/7 * 227.5

S2 = 1137.5/7

S2 = 162.5 ft²

Answer:

56  hardwood     80  pine bark

Step-by-step explanation:

H = hardwood    B= pine bark

B +H = 136

B = (136-H)

4.25 H + 3.75 (136-H) = 538

4.25H + 510 - 3.75H = 538

0.5 H = 28

1H = 56   (56 Hardwood)

136-56= 80  

56x 4.25 + 80 x 3.75 = 538

$238 + $300 = $538

Answer:

Em matemática, costumamos usar a letra “x” para representar a quantidade desconhecida. Mas agora x está em toda parte em nossa sociedade. As pessoas usam “x” para representar algo inexplicável ou desconhecido, como raio-X, arquivo X e  i hope that helps :)

Answer:

the answer should be B becaise just multiply and then round up that is what I got good luck

Answer:

216 cubic inches

Jena's large jewelry box is 132 inches³ bigger than her small cube jewelry box.

What is a cube?

A cube is a three dimensional figure. All of it's sides are equal in length and all the planes of it are perfect square.

Given, length of the each side of Jena's small jewelry box = 2 inches.

Therefore, the volume of the small jewelry box is = 2³ inches³ = 8 inches³.

Again, length of the each side of Jena's small jewelry box are 7 inches, 5 inches, and 4 inches.

Therefore, the volume of the small jewelry box is = (7 × 5 × 4) inches³ = 140 inches³.

Hence, the difference = (140 - 8) inches³ = 132 inches³.

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The surface area of the figure will be equal to 1326 square meters.

The space occupied by any two-dimensional figure in a plane is called the area. The area of the outer surface of any body is called as the surface area.

Given that:-

The surface area will be calculated as:

SA = 2 { LW + LH + WH )

SA = 2 { ( 9 x 12) + (15 x 22 ) + (15 x 9 )}

SA = 1326 square meters.

Therefore the surface area of the figure will be equal to 1326 square meters.

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Answer:

[tex] - \frac{2}{4 } = - \frac{16}{32} [/tex]

[tex] - \frac{6}{8} = - \frac{24}{32} [/tex]

[tex] - \frac{13}{32} = [/tex]

remains the same

Answer:

Students 1 & 4

Step-by-step explanation:

An expression has NO equal sign, EQUATIONS have equals.

2 & 3 have equals which makes then equations.

~R3V0

Solution :

      x                   [tex]$(x-\overline x)$[/tex]                          [tex]$(x-\overline x)^2$[/tex]

45860             -1742.8571                 3037551.0204

38860            -8742.8571                 76437551.0204

64820              17217.1429                296430008.1633

63480             15877.1429                252083665.3061

36710              -10892.8571              118654336.7347

50410             2807.1429                 7880051.0204

33080             -14522.8571            210913379.5918    

333220          0.0000                        965436542.8571

Sample size, n = 7

Mean = [tex]$\frac{\sum x}{n}=\frac{333220}{7}$[/tex]

                   = 47602.8571

Variance = [tex]$\frac{(\sum (x- \overline x))^2}{(n-1)}=\frac{965436542.8571}{7-1}$[/tex]

                                       = 160906090

Standard deviation = [tex]$\sqrt{Variance} = \sqrt{160906090}$[/tex]

                                                     = 12684.876

a). df = n - 1

        = 7 - 1

       = 6

Level of significance, α = 0.02

Critical, [tex]$t_c = 3.143$[/tex]

b). Sample mean, [tex]$\overline x = 47602.8571$[/tex]

    Sample standard deviation, s = 12684.876

Sample size, n = 7

c). 98% confidence interval = [tex]$\overline x \pm t_c \times \frac{s}{\sqrt n}$[/tex]

                                             [tex]$=47602.8571 \pm 3.143 \times \frac{12684.876}{\sqrt 7}$[/tex]

                                             [tex]$=(32533.96,62671.76)$[/tex]

Answer:

Every day Dajuan will paint 14.5 square feet of the wall.

Step-by-step explanation:

Since Dajuan is painting a mural on a rectangular wall, which measures 14.5 feet long and 10 feet wide, and so far, his mural covers 60% of the wall, and Dajuan will paint the remaining part of the wall over the next four days, painting the same amount of the wall, in square feet, on each of those four days, to determine how much of the wall, in square feet, will Dajuan paint on each of the next four days, the following calculation must be performed:

((14.5 x 10) x 0.4) / 4 = X

(145 x 0.4) / 4 = X

58/4 = X

14.5 = X

Therefore, every day Dajuan will paint 14.5 square feet of the wall.

9514 1404 393

Answer:

  -6, -5, -4, -3

Step-by-step explanation:

Integers greater than -7 include ... -6, -5, -4, ....

Integers less than or equal to -3 include ... -3, -4, -5, ....

The set of integers in the range -7 < n ≤ -3 is ...

  {-6, -5, -4, -3}