Can someone please explain this to me ?

Answer:

#20 = 13

#21 = 1

#22 = -3

Step-by-step explanation:

Replace all of the x values in the equations for the one in the table.

Then solve.

This is the equation

Y= -4x - 3

A. x = -4

Replace x with -4.

   Y = -4 (-4) - 3

Solve.

   Y = 16 - 3

   Y = 13

#20 = 13

B. x = -1

Replace x with -1

   Y = -4 (-1) - 3

Solve.

   Y = 4 - 3

   Y = 1

#21 = 1

C. x = 0

Replace x with 0.

   Y = -4 (0) - 3

Solve.

   Y = 0 - 3

   Y = -3

#22 = -3

Answer:

The measure of its complement is 40°

Step-by-step explanation:

∵ The measure of angle PQR equal 50 degrees

∴ m∠PQR = 50°

∵ Angle x is the complement angle of angle PQR

→ That means the sum of the measures of angle x and angle PQR is 90°

∴ m∠x + m∠PQR = 90

→ Substitute measure of angle PQR by 50°

∴ m∠x + 50 = 90

→ Subtract 50 from both sides

∴ m∠x + 50 - 50 = 90 - 50

∴ m∠x = 40°

∴ The measure of its complement is 40°

Answer:

0.3 m/s

Step-by-step explanation:

[tex]\dfrac{dx}{dt}=\text{Speed of person}=0.8\ \text{m/s}[/tex]

As the two triangles in the diagram are similar to each other we have

[tex]\dfrac{y}{12}=\dfrac{2}{8}\\\Rightarrow y=12\times \dfrac{2}{8}\\\Rightarrow y=3\ \text{m}[/tex]

Again as the triangles are similar we have

[tex]\dfrac{y}{2}=\dfrac{12}{12-x}\\\Rightarrow x=12-\dfrac{24}{y}[/tex]

Differentiating the above equation with respect to time we get

[tex]\dfrac{dx}{dt}=\dfrac{-24\times-1}{y^2}\dfrac{dy}{dt}\\\Rightarrow \dfrac{dy}{dt}=\dfrac{dx}{dt}\times\dfrac{y^2}{24}\\\Rightarrow \dfrac{dy}{dt}=0.8\times \dfrac{3^2}{24}\\\Rightarrow \dfrac{dy}{dt}=0.3\ \text{m/s}[/tex]

The speed at which the shadow is changing is 0.3 m/s.

Step-by-step explanation:

Don (8+x)

Mark (2x)

Don + Mark = 68

(8+x) + 2x =68

x + 2x = 68-8

3x =60

x =20

Therefore, Don has 28 marbles while Mark has 40 marbles

The amount  that  each boy have to sell if the total number of marbles is 68 is : Don 16  and Mark  52

Let M represent Mark and D represent Don

Hence:

M+D= 68 marbles

M = 68-D

D = 2M+8

D = 2(68-D)+8

D = 136-2D+8

9D = 144

D = 16

Thus:

Don = 16

Mark =68-16= 52

The amount  that  each boy have to sell if the total number of marbles is 68 is : Don 16  and Mark  52

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Answer:

gladly

Step-by-step explanation:

Answer:

how much friends cuz you can calculate without the total amount of people

Step-by-step explanation:

12*1/2 = 6

1/3 * 18 =9

Hope this helps

Answer:

the answer should be C y= -7x - 2

Answer:

c. y = -7x - 2

Step-by-step explanation:

its the only one that has the correct y-intercept (-2)

Answer:

3

Step-by-step explanation:

4x3=12

12-1=11

Answer:

99% Confidence Interval = (5.824,6.036)

Step-by-step explanation:

The coffee and soup machine at the local subway station is supposed to fill cups with 6 ounces of soup. Ten cups of soup are bought with results of a mean of 5.93 ounces and a standard deviation of .13 ounces. Construct a 99 percent confidence interval for the true machine-fill amount.

The formula for confidence interval

= Mean ± z × σ/√n

Mean of 5.93 ounces

Standard deviation of .13 ounces.

n = 10 cups

z= z score of 99% confidence interval = 2.58

Confidence Interval =

5.93 ± 2.58 × 0.13/√10

5.93 ± 2.58 × 0.0411096096

Confidence Interval = 5.93 ± 0.106

= 5.93 - 0.106

= 5.824

= 5.93 + 0.106

= 6.036

Hence, Confidence Interval = (5.824,6.036)

Answer:

i think its A. or D.

Step-by-step explanation:

Answer:

D.

Step-by-step explanation:

0.2325 times 280 is 65.1

280-65.1

214.9

214.9 divided by 2

107.45

107.45 times 0.35

37.6075 rounded to 37.61

Answer:

x < 11

Step-by-step explanation:

5 (x + 4) < 75

5 (x + 4)/5 < 75/5

x +4 < 15

x + 4 - 4 < 15 - 4

x < 11

In a direct variation, y = 16 when x = 4. The direct variation equation shows the relationship between x and y will be y=4x.

An equation is a statement that two expressions, which include variables and/or numbers, are equal. In essence, equations are questions, and efforts to systematically find solutions to these questions have been the driving forces behind the creation of mathematics.

It is given that,

y = 16 when x = 4

There are often two different sorts of variables in analytics. We obtained that independent variables will have an impact on dependent variables. What occurs as a result of the independent variable is referred to as a dependent variable.

In the given equation x is the independent variable while y is the dependent variable.

16 = 4(4)

y=4x

Thus, in a direct variation, y = 16 when x = 4. The direct variation equation shows the relationship between x and y will be y=4x.

Learn more about the equation here,

https://brainly.com/question/10413253

#SPJ2

Answer:

its c

Step-by-step explanation:

HAS TO BE C

Answer:

slope = 0

Step-by-step explanation:

m=y2-y1/x2-x1

m=5-5/-2-2

m=0

Answer:9

Step-by-step explanation:

Answer:

He had 24 minutes to finish all the hours

Step-by-step explanation:

75-51=24

Answer:

A. -5i√3

Step-by-step explanation:

-√-75 = - √(i^2)* 25 *3 = - 5i√3

Answer:

The equation of the line is y = 6x + 10.

Step-by-step explanation:

(-3,-8) (1 ,16)

x1, y1. x2,y2

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

= (16 - (-8))/(1 - (-3))

= 24/4 = 6

Equation of a line is given as:

(y - y1) = m(x - x1)

y - (-8) = 6(x - (-3))

y + 8 = 6x + 18

y = 6x + 10

Answer:

The slope is 4/5 (blue) because if you go up 4 and right 5 from the dot at (-1,-2), you would be at the next dot which is at (4,2)

Step-by-step explanation:

Hope this helps and pls do mark me brainliest if you can:)

Answer:

$36

Step-by-step explanation:

Answer:

1.

Number of individual songs, s                                  Number of albums, a  

                    6                                                                            3  

                  22                                                                           1

                   30                                                                          0

If Jada buys 6 songs, she would have spent;

= 6 * 0.5 = $3

This would leave her with = 15 - 3 = $12

With each album costing $4, she can buy = 12/4 = 3 albums

If Jada buys 1 album, she would have spent $4

This would leave her with = 15 - 4 = $11

With each song costing $0.50, she can buy = 11/0.5 = 22 songs

If Jada buys 30 songs, she would have spent;

= 30 * 0.5 = $15

This would leave her with = 15 - 15 = $0

She wouldn't be able to buy any albums.

2. One song costs $0.50 so representing that would be;

= 0.50s

One album costs $4 so representing that is;

= 4a

Jada has $15 to spend so the songs and albums must add up to $15.

Equation therefore is;

0.5s + 4a = 15

Answer:

true because 200 and 300 are factors of 600

Step-by-step explanation:

Answer:

I don't think so

Step-by-step explanation:

600 is a composite number.

Prime factorization: 600 = 2 x 2 x 2 x 3 x 5 x 5, which can be written 600 = (2^3) x 3 x (5^2)

The exponents in the prime factorization are 3, 1 and 2. Adding one to each and multiplying we get (3 + 1)(1 + 1)(2 + 1) = 4 x 2 x 3 = 24. Therefore 600 has exactly 24 factors.

Factors of 600: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 50, 60, 75, 100, 120, 150, 200, 300, 600

Factor pairs: 600 = 1 x 600, 2 x 300, 3 x 200, 4 x 150, 5 x 120, 6 x 100, 8 x 75, 10 x 60, 12 x 50, 15 x 40, 20 x 30 or 24 x 25

Taking the factor pair with the largest square number factor, we get √600 = (√100)(√6) = 10√6 ≈ 24.494897. (Note: 2 + 4 = 6 and 49 + 48 = 97 so this square root and √6 can be easy to remember.)

Answer:

Flase. Actually most perfect squares are odd numbers

Step-by-step explanation:

hope this helps

NEED brainlyest please

have a good day

Answer:

4

Step-by-step explanation:

Answer:

its b but i am not sure because my text was different