Please help with this question.

Answer:

-20

Step-by-step explanation:

Step 1: Define

-4x - 8

x = 3

Step 2: Substitute and Evaluate

-4(3) - 8

-12 - 8

-20

Answer:

-20

Step-by-step explanation:

please give brainliest

B

Step-by-step explanation:

Answer:

443,160 before the mortgage is taken out once the mortgage is taking out it is 248,000.

Step-by-step explanation:

Brainly me please

Answer:

the answer is 1024

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

the x intercept is 4 so the answer is 4

Answer:

1.6km

Step-by-step explanation:

Perimeter of rectangle = 2 x length +2 x breadth

= 2(50) +2(30) = 160

This = 1 time around the park but he does it ten times

so 160 x 10 = 1600m

To get to km, we divide by 1000 since there are 1000m in a km

1600/1000=1.6km

Answer:

answer: increased 20%

Step-by-step explanation:

288 - 240 = 48

48/240 *100 = 20%

hope i helped :)

Answer:

0.244

Step-by-step explanation:

Number of suits = 4 ( clubs, diamonds, hearts and spades )

number of cards in each suit = 13 , since there is a heart in every suit

The probability of picking a heart ( h ) = 1/13

probability of landing a 5 on a roll of dice (d ) = 1/6

Therefore the probability of A heart is picked and a 5 is landed on a roll of dice

P(A) = P( h ) and P( d ). This is because the events are independent of each other

      = 1/13 + 1/6

      = 0.0769 + 0.1667 = 0.2436 ≈  0.244

Answer:

Their similar

Step-by-step explanation:

Answer Because shape I is similar to shape II and shape II is similar to shape III, shape I is similar to shape III.

Step-by-step explanation:

Answer:

C) 3923

Step-by-step explanation:

5(861)-382

4305-382

3923

Answer:

[tex] \huge{ \fbox{ \sf{3923}}}[/tex]

Step-by-step explanation:

[tex] \sf{ \: 5 \: * \: 861 \: - \: 382}[/tex]

Multiply the numbers :

[tex] \longrightarrow{ \sf{4305 - 382}}[/tex]

Subtract 382 from 4305

[tex] \longrightarrow{ \boxed{ \sf {3923}}}[/tex]

Hope I helped!

Best regards! :D

~[tex] \sf{TheAnimeGirl}[/tex]

Answer:

c=-5/2-d/2.

Step-by-step explanation:

Answer if i am solving for c

the top one: 15= -6c+3d

Step-by-step explanation:

for the top one, all you can do is distribute the 2c and d and get 15=-6c+d

I don't get a b c d because you can't solve it/ it doesnt make any sense

Answer:

x = 0 or x = -3/2

Step-by-step explanation:

-4x² = 6x

Subtract 6 from each side: -4x²- 6x = 0

Factor left side of equation: -2x (2x + 3) = 0

Set factors to 0: -2x = 0 or 2x + 3 = 0

x = 0 or x = -3/2

I hope this helped, please mark Brainliest, thank you!

Answer:

9+3x=0

Step-by-step explanation:

Answer:

b.d Have a blessed Day ^w^

Step-by-step explanation:

Answer:

C) 73

Step-by-step explanation:

The angles that measure 146° and (-39 + x)° are considered to be supplementary angles. A supplementary angle is when two angles sum up to equal 180°. We can create an equation with what we know;

146 + (-39 + x) = 180

~Remove parenthesis

146 - 39 + x = 180

~Combine like terms

107 + x = 180

~Subtract 107 to both sides

x = 73

Best of Luck!

Answer:

[See Below]

Step-by-step explanation:

[tex]Hey~There![/tex]

_____________________

→ Divide:

_____________________

[tex]Hope~this~helps![/tex]

[tex]-Shane,~SpamIsTheMan :)[/tex]

Well, if you think about it its quite easy.

Whats [tex]16.9 x 3.75[/tex]?

63.375.

Round it to, C) 63.38$

-BBBM

The cost of the total amount of gas will be $63.38. The correct option is C.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that Quintin stopped and bought 16.9 gallons of gas at a rate of $3.75 per gallon.

The cost of the total amount of the gas will be calculated as,

Cost = Total gas x cost per gallon

Cost = 16.9 x $3.75

Cost = $63.38

Hence, the cost will be $63.38.

To know more about an expression follow

https://brainly.com/question/14028606

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Answer:

7$4.45.......?!!!!!!!!!

Answer:

The slope is 3 over 4

Step-by-step explanation:

Answer: -¾

The slope of  (-2, 1) (2,-2) is -¾.

Plz mark brainliest:)

Answer:

the slope is 4 and the y intercept is (0,-3)

Step-by-step explanation:

When working with this its best to remember y=mx+b, the slope will always be in front of the X. so for example 7x+y=5 ( not a real problem ) but the slope would be 7 because its in front of the X.

Answer:

The coefficient of correlation is 0.7098.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

The formula to compute the correlation coefficient is:

[tex]r=\frac{n\cdot \sum XY-\sum X\cdot \sum Y}{\sqrt{[n\cdot\sum X^{2}-(\sum X)^{2}][n\cdot\sum Y^{2}-(\sum Y)^{2}]}}[/tex]

The required values are computed in the Excel sheet attached below.

Compute the value of r as follows:

[tex]r=\frac{n\cdot \sum XY-\sum X\cdot \sum Y}{\sqrt{[n\cdot\sum X^{2}-(\sum X)^{2}][n\cdot\sum Y^{2}-(\sum Y)^{2}]}}[/tex]

  [tex]=\frac{(6\cdot 4877.5)-(303.3\cdot 96.3)}{\sqrt{[(6\cdot15367.3)-(303.3)^{2}][(6\cdot1550.7)-(96.3)^{2}]}}\\\\=\frac{57.21}{80.597}\\\\=0.70983\\\\\approx 0.7098[/tex]

Thus, the coefficient of correlation is 0.7098.

Answer:

13a+27

Step-by-step explanation:

8a+12+5a+15= 13a+27

Answer:

If your looking for a simplified Expression then the answer would be 13a+27

Answer:

See explanation

Step-by-step explanation:

Given:

400 students takes same final exam.

some students have 90 minutes to complete the exam.

other students have 120 minutes to complete the exam.

Each student is randomly assigned one of the examination times, based on the flip of a coin.

Y denotes the number of points scored on the exam by the i-th student (0 <Yi < 100) so it is an dependent variable

X denotes the amount of time that the student has to complete the exam (Xi = 90 or 120) so it is an independent variable

the regression model:  [tex]Y_{i} = \beta _{0} +\beta_{1} X_{1} +[/tex]μ[tex]_{i}[/tex]

a)

The term μ[tex]_{i}[/tex] represents other factors or unobserved factors that have an effect on individual student's exam score. For example, studying time varies with students and varying aptitude for the subject, capability possessed by different students etc. ui is basically the error term.

b)

Due to random assignment of X[tex]_{i}[/tex] ,  μ[tex]_{i}[/tex] is independent of X[tex]_{i}[/tex] . Since μ[tex]_{i}[/tex] represents deviations from the average value, so E(μ[tex]_{i}[/tex]) = 0. Also since X[tex]_{i}[/tex] and  μ[tex]_{i}[/tex] are independent hence E (μ[tex]_{i}[/tex] | X[tex]_{i}[/tex]) = 0

c)

The assumption that (X[tex]_{i}[/tex],[tex]Y_{i}[/tex]), i = 1,2,...,...n are independent and identically distributed drawn from the joint distribution is true if this year's students are viewed as random draws from population of students that take this class.

The assumption holds because 0≤ [tex]Y_{i}[/tex] ≤ 100 and Xi can take  on only two values that are 90 and 120. So these restricted values make the assumption true.

d)

Given is the estimated model:

Y = 49 + 0.24 X[tex]_{i}[/tex]

The computation of prediction for the average score of students given 90 minutes to complete the exam is:

Y = 49 + 0.24 * 90

  = 49 + 21.6

Y = 70.6

The computation of prediction for the average score of students given 120 minutes to complete the exam is:

Y = 49 + 0.24 * 120

  = 49 + 28.8

Y =  77.8

Average score of students given 150 minutes to complete the exam is:

Y = 49 + 0.24 * 150

  = 49 + 36

Y =  85

The average predicted gain in score for a student who is given an additional 10 minutes on the exam is:

Y =  0.24 * i

Y =  0.24 * 10

Y =  2.4

Answer:

y = -7x + 36

Step-by-step explanation:

y = mx + b

8 = -7(4) + b

8 = -28 + b

b = 36

y = -7x + 36

The equation of the line that has slope of -7 and passes through the point (4, 8) is y = -7x + 36.

Slope of a line is the ratio of the change in y coordinates to the change in the x coordinates of two points given.

Given that slope of the line = -7

A point that the line passes through is (4, 8).

The general equation of the line in slope intercept form is,

y = mx + c, where m is the slope and c is the y intercept.

Now y intercept is the y coordinate of a point when the x coordinate is 0.

Substituting the slope and the point in the general equation,

8 = (-7 × 4) + c

8 = -28 + c

c = 8 + 28

c = 36

Substituting ,m = -7 and c = 36 in the general equation,

y = -7x + 36

Hence the equation of the line having slope of -7 and passing through (4, 8) is y = -7x + 36.

To learn more about Slope, click on the link given below :

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Answer:

n = (-44/9) or [tex]-4 \frac{8}{9}[/tex]

Step-by-step explanation:

n – 2 = 10n + 42

-n          - n

-2 = 9n + 42

-42        - 42

-44 = 9n

-44/9 = n

Answer:

Step-by-step explanation:

n-2= 10n+ 42

+2             +2

n     =    10n + 44

-10n     -10n

-9n = 44

/-9      /-9

n = -4.8

Answer:

34

Step-by-step explanation:

(40×85)/100

3400/100

34

is right answer

Answer:

i odnt know im sorry

Step-by-step explanation:

Answer:

d=rt

d=8(6)

d=48 miles

Step-by-step explanation: