HELP ME PLEASE!!!!!!!!!!!!!!!!!!!!



Which of these shows the result of using the first equation to substitute for y in the second equation, then combining like terms? y = 2x 2x + 3y = 16
A. 8x = 16
B. 4x = 16
C. 5x = 16
D. 5y = 16

Answer:

b.14.2 mph

Step-by-step explanation:

Answer:

The cart’s speed in miles per hour is 14.2 miles per hour .

Option (B) is correct .

Step-by-step explanation:

As given

Rob measures his go-cart’s speed to be 250 inches per second.

As

[tex]1\ inch = \frac{1}{63360}\ miles[/tex]

[tex]1\ second = \frac{1}{3600}\ hours[/tex]

Now convert 250 inches per second into miles per hour .

[tex]250 inches\ per\ second = \frac{250\times \frac{1}{63360}}{\frac{1}{3600}}\ miles\ per\ hour[/tex]

[tex]250 inches\ per\ second = \frac{\frac{250}{63360}}{\frac{1}{3600}}\ miles\ per\ hour[/tex]

[tex]250 inches\ per\ second = \frac{250\times 3600}{63360}\ miles\ per\ hour[/tex]

[tex]250 inches\ per\ second = \frac{900000}{63360}\ miles\ per\ hour[/tex]

250 inches per second = 14.2(Approx) miles per hour.

Therefore the cart’s speed in miles per hour is 14.2 miles per hour .

Option (B) is correct .

Answer:

Value of house before Increase = $700000.

Step-by-step explanation:

Let the value of house before increase be $x.

Increase in value = 7%of x= .07x

Value of house before increase+ Increase in value = Total value.

x+.07x=749000

Adding like terms,

1.07x=749000

Dividing both sides by 1.07.

x=700000.

Value of house before Increase = $700000.

Total cost of the purchase by Barry is given by the equation A = $ 36 and the amount saved by Barry is $ 14

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the cost of all the purchase by Barry be A

Now , the equation will be

The cost of the sweater = $ 50

The marked down percentage of sweater = 20 %

So , the new cost of the sweater = cost of the sweater - ( marked down percentage x cost of the sweater )

Substituting the values in the equation , we get

The new cost of the sweater = 50 - ( 20/100 ) x 50

The new cost of the sweater = 50 - 10

The new cost of the sweater = $ 40

Now , the coupon discount percentage = 10 %

So , the final cost of the purchase A = new cost of the sweater - ( coupon discount percentage x new cost of the sweater )

Substituting the values in the equation , we get

The final cost of the purchase A = 40 - ( 10/100 ) x 40

The final cost of the purchase A = 40 - 4

The final cost of the purchase A = $ 36

So , the amount saved by Barry = cost of the sweater - final cost of the purchase

The amount saved by Barry = 50 - 36 = $ 14

Hence , the cost of the sweater is $ 36

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ5

Given

Paul invested three times as much money in the account paying 5% interest then he did in an account paying 4%.

Total interest paid was $475

Find out  he invest in each.

To proof

Let us assume that Paul invested  in an account paying 4% be = x

As given in the question

Paul invested three times as much money in the account paying 5% interest then he did in an account paying 4%.

Let us assume that Paul invested  in an account paying 5% be = 3x

Total interest paid = $475

First convert 4% in the decimal form

[tex]=\frac{4}{100}[/tex]

= 0.04

First convert 5% in the decimal form

[tex]=\frac{5}{100}[/tex]

= 0.05

Than the equation become in the form

0.04x + 0.05 × 3x = 475

0.04x + 0.15x = 475

0.19x = 475

x = $2500

Paul invested  in an account paying 4% be = $2500

Paul invested  in an account paying 5% be = $7500

Hence proved

Answer:

Option C

Step-by-step explanation:

given two equations

6m-5n= 14   ... i

2m+2n= -10  ...ii

We can solve this by elimination.

For elimination consider the coefficients of m.

They are 6 and 2, with LCD 6

You multiply 2nd equation by 3 to have

6m+6n =-30 ... iii and

6m-5n  = 14  ... i

Subtract i from iii

11n = -44

Divide by 11 to get n

n = -4

Substitute in I equation

6m-5(-4) =14

6m +20 = 14

subtract 20

6m =14-20 =-6

divide by 6

m =-1

Hence answer is m=-1 and n=-4

(-1,-4)

Option C is the answer.

X=11 because

5x+9x+26=180

14x+26=180

14x=154

x=11

Answer:  The required value of x is 11.

Step-by-step explanation:  Given that the lines f and g are parallel to each other.

We are to find the value of x.

From the figure, we note that the parallel lines f and g are cut by a transversal,  and

angles with measures 5x° and (9x+26)° are interior angles on the same side of the transversal.

We know that, if two lines are parallel, then the measures of the angles on the same side of the transversal is 180°.

Therefore, we get

[tex]5x^\circ+(9x+26)^\circ=180^\circ\\\\\Rightarrow 5x+9x+26=18\\\\\Rightarrow 14x=180-26\\\\\Rightarrow 14x=154\\\\\Rightarrow x=\dfrac{154}{14}\\\\\Rightarrow x=11.[/tex]

Thus, the required value of x is 11.

Answer:

C.your GPA

Step-by-step explanation:

In general, employment applications require all of the following except:

C.your GPA

The GPA is not as important as the references, ones employment history and the highest level of education.

These information gives an overview about your history like if you are a fresher or an experienced person. And what education have you got, or who referred you to this particular company.

The GPA's are not considered at the first place. When a person progresses in an interview, then GPA might be considered to gather information like the person is how much efficient in that particular subject.

Use the value for the variable to solve for the other unknowns.  Substitute the value for the variable into the expression for the number of seats on the middle level.  Substitute the value for the variable into the expression for the number of seats on the lower level.

Use the value for the variable to solve for the other unknowns.  Substitute the value for the variable into the expression for the number of seats on the middle level.

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Use the value for the variable to solve for the other unknowns.  Substitute the value for the variable into the expression for the number of seats on the middle level.  Substitute the value for the variable into the expression for the number of seats on the lower level.

To know more about Expression follow

https://brainly.com/question/723406

#SPJ2

Answer:

(-6, 36)

Step-by-step explanation:

The standard form: ax^2 + bx + c

In this case:

a is 1

b is 12

c is 0

Calculate -b / 2a. This is the x-coordinate of the vertex.

To find the y-coordinate of the vertex, simply plug the value of -b / 2a into the equation for x and solve for y. This is the y-coordinate of the vertex.

-12 / ( 2 x 1 )

-12 / 2

-6

You log -6 in the function

f(x) = x^2 + 12x

f(-6) = (-6)^2 + 12(-6)

      = 36 +  (-72)

      = 36 - 72

      = 36

I hope this

Answer: A (-6, -36)

Step-by-step explanation:

A.1/16 of a pound. Hope i helped

Answer:

A

Step-by-step explanation:

12x^2-44x+7 = (6x - 1)(2x - 7)

35x^2-27x-18 = (7x - 9)(5x +2)

2(x + 3) ≥ -10 - 4x

2x + 6 ≥ -10 - 4x

+4x               +4x

6x + 6 ≥ -10

      -6   -6  

6x       ≥ -16

      [tex]\frac{6x}{6} \geq \frac{-16}{6}[/tex]

      [tex]x \geq -\frac{8}{3}[/tex]        reduced fraction

2(x+3) greater than or equal to -10 - 4x

So

2(x+3) >= -10 - 4x

2x + 6 >= -10 - 4x

2x + 4x >= -10 - 6

6x >= - 16

 x >= - 16/6

 x >= - 8/3

x=-64/35

-6/5x+2= 21/25

Do fraction cross multiply

(-6*25=(5x+2)21

Then swap the sides (5x+2) *21 = (-6)*25

multiply(5x+2)21= -150/21

simplify

5x+2=- 50/7

subtact 2

5x+2-2=- 50/7-2

silmplify 5x=-64/7

divide by 5

5x/5=-64/7/5

simplify

x= -64/35

Solve:

-6/5x    +     2     =     21/25

Steps:

Solution      -6/5x    +     2     =     21/25      =======>   29/30,    Decimal  =====>   x   =   0.96667

Subtract  2 from both sides:

-6/5x    +     2     -   2    =     21/25     -    2

Simplify:

-6/5x      =     -29/25

Multiply both sides by   -25:

(-6/5x )(-5)     =     (-29/25 )(-5)

Simplify:

6x    =   29/5

Divide both sides by 6:

6x/6         =     29/5/6

Simplify:

Answer        x        =    29/30         Decimal:     0.96667....

Hope that helps!!!!                                      : )

Answer:

[tex]r(x)=(4x)^7[/tex]

Step-by-step explanation:

For example,

If we wanted to horizontally compress [tex]y=x^2[/tex], we would multiply by 4 to get [tex]y=(4x)^2[/tex], and

if we wante to horizontally expand [tex]y=x^2[/tex], we would multiply by [tex]\frac{1}{4}[/tex] to get [tex]y=(\frac{1}{4}x)^2[/tex]

Since this question asks for horizontal compression, we multiply the [tex]x[/tex] of the function by 4. So the function we need is [tex]f(x)=(4x)^7[/tex]. The second choice is correct.

Answer: The area of the mobile is 140.4 m².

Step-by-step explanation:

Hi to solve this problem we have to analyze the information given:

Width : 7.2 meters (a)

Length : 19.5 meters (b)

The mobile is rectangular. So, we have to apply the area of a rectangle formula.

The area of the mobile is 140.4 m².

Feel free to ask for more if it´s necessary or if you did not understand something.

Answer:

You need annual gross pay of 20000.

Step-by-step explanation:

Suppose, your annual gross pay is  [tex]x[/tex]

You estimate that the net pay will be 65% of your gross pay. So, the annual net pay will be:  [tex]x*65\% = 0.65x[/tex]

As there are 52 weeks in 1 year, so your weekly net pay will be:  [tex]\frac{0.65x}{52}[/tex]

Given that, you will need 250 per week after taxes to get by. So, the equation will be......

[tex]\frac{0.65x}{52}=250\\ \\ 0.65x= 52*250=13000\\ \\ x=\frac{13000}{0.65}=20000[/tex]

So, you need annual gross pay of 20000.

Answer:

c = 3 oil changes

Step-by-step explanation:

The fixed rate for oil change is $ 40

The surplus rate for miles outside the radius is $ 2.25

Josh lives 7 miles of the radius

Therefore an equation for c: The largest number of oil changes that can be scheduled and maintained within the budget for the year is:

[tex]\\40c + 2.25 * 7c = 200\\c (40 + 2.25 * 7) = 200\\c =\frac{200}{40 + 2.25 * 7}\\c = 3,578\\c = 3[/tex] oil changes

Therefore, with the budget set Josh can make a maximum of 3 oil changes per year

Answer:

The answer is 3

Step-by-step explanation

mileage fee for each oil change: 7(2.25) = $15.75

service call + mileage fee = total for each oil change

$40 + $15.75 = $55.75

c = number of oil changes

55.75c = total amount for all oil changes

55.75c ≤ 200

c ≤ 3.59

Therefore, the greatest number of oil changes that Josh can schedule without exceeding his budget is 3.

[tex]y=\dfrac{8x+3}{4}=\dfrac{8x}{4}+\dfrac{3}{4}=2x+\dfrac{3}{4}[/tex]

It's a linear function y = mx + b. The domain of linear function is the set of all real numbers.

We have no objections to the value of x. x can be any number.

Therefore your answer is:

a) All real numbers.

[tex]\sqrt{63} = \sqrt{9*7} = \sqrt{3*3*7}  = 3\sqrt{7}[/tex]

The simplified form of √(63) after removing all perfect squares from inside the square root is 3√(7).

To simplify the square root of 63 and remove perfect squares, we start by finding the prime factorization of 63. The prime factorization of 63 can be obtained by dividing the number by its smallest prime factor, which is 3, and then continuing the process for each quotient until we get a prime number. The prime factorization of 63 is:

63 = 3 * 3 * 7.

Now, we look for any perfect square factors within the square root of 63. In this case, the perfect square factor is 3 * 3 (3 squared). We can remove this perfect square from the square root, leaving us with:

√(63) = √(3 * 3 * 7).

Since we removed one pair of 3's (3 * 3), the simplified square root of 63 becomes:

√(63) = 3√(7).

To know more about square root here

https://brainly.com/question/29286039

#SPJ2

ANSWER

[tex]x=-2\pm 2\sqrt{2}[/tex]

EXPLANATION

Given:

[tex]x^2+4x-4=0[/tex]

We complete the square as follows;

Add 4 to both sides of the equation:

[tex]x^2+4x=4[/tex]

Add half the coefficient of [tex]x[/tex] to both sides of the equation.

[tex]x^2+4x+(2)^2=4+(2)^2[/tex]

The Left Hand Side of the equation is now a perfect square.

[tex](x+2)^2=4+4[/tex]

[tex](x+2)^2=8[/tex]

Take the square root of both sides

[tex]x+2=\pm \sqrt{8}[/tex]

[tex]x=-2\pm 2\sqrt{2}[/tex]

Hence the correct answer is option C

Given equation is [tex]x^2+4x-4=0[/tex]

compare with [tex]ax^2+bx+c=0[/tex]

we get: a=1, b=4, c=-4

plug these values into quadratic formula:

[tex]x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}[/tex]

[tex]x=\frac{-4 \pm \sqrt{4^2-4(1)(-4)}}{2(1)}[/tex]

[tex]x=\frac{-4 \pm \sqrt{16-4(-4)}}{2}[/tex]

[tex]x=\frac{-4 \pm \sqrt{16+16}}{2}[/tex]

[tex]x=\frac{-4 \pm \sqrt{32}}{2}[/tex]

[tex]x=\frac{-4 \pm 4\sqrt{2}}{2}[/tex]

[tex]x=-2 \pm 2\sqrt{2}[/tex]

Hence finall answer is:

[tex]x=-2+2\sqrt{2}[/tex] and [tex]x=-2-2\sqrt{2}[/tex]

Answer 5/14

Step-by-step explanation:

The simplest form of the given expression [tex]\frac{5}{8} \times \frac{4}{7}[/tex] is [tex]\frac{5}{14}[/tex].

An expression is a combination of numbers, variables, operations, functions, and often symbols that are combined according to particular rules to represent a mathematical computation or relation.

Expressions can be both simple as a single number or variable and complex by involving multiple variables and operations.

Some examples of Expressions are x, 4, x² + 6y + 2xy +6, [tex]\frac{x}{y}[/tex], [tex]\frac{x}{y} \times \frac{p}{q} \div e^7[/tex] etcectra.

The given expression is

[tex]\frac{5}{8} \times \frac{4}{7}[/tex] [tex]= \frac{5}{2}\times \frac{1}{7}[/tex]

        [tex]= \frac{5\times1}{2\times7}\\ = \frac{5}{14}[/tex].

Hence the given expression [tex]\frac{5}{8} \times \frac{4}{7}[/tex] can be simplified as [tex]\frac{5}{14}[/tex].

Learn more about Expression here:

https://brainly.com/question/34132400

#SPJ6

[tex]f(x)=3x+5,\ g(x)=-2x^2-5x+3\\\\(f+g)(x)=f(x)+g(x)=(3x+5)+(-2x^2-5x+3)\\\\=3x+5-2x^2-5x+3=-2x^2+(3x-5x)+(5+3)=-2x^2-2x+8\to\boxed{C.}[/tex]

toby will reach more people in 40 phone calls

The way to solve this problem is to turn both denominators into 40

4 * 4        16

_          =  ---       so Clara will reach 16 people in 40 phone calls

10 * 4       40

3  * 5       15

_           = ----        so Toby will reach 15 people in 40 phone calls

8 * 5         40

Therefore Clara will reach more people in 40 phone calls than Toby.

F(x) = 1/2x^2 is a variation of the basic graph y = x^2 (the squaring function).

The graph of the squaring function has the shape of a parabola that opens up.  Its vertex is at (0,0).

The graph of F(x) = (1/2)x^2 has the same shape, but is compressed vertically by a factor of (1/2).   The vertex of F(x) = (1/2)x^2 is still (0,0).  That eliminates the first 2 possible answers.  Note that F(1) = (1/2)(1)^2 = 1/2.  The point (1, 1/2) is on the third graph, but not on the fourth.  Thus, the third graph is correct.

Only the third graph (option C) represents the graph of [tex]F(x) = \frac{1}{2} x^2[/tex]

The given function is:

[tex]F(x) = \frac{1}{2} x^2[/tex]

This graph is of the form [tex]y = ax^2[/tex] and it takes the shape of a parabola with center at (0, 0)

Only two of the graphs shown among the options have the center at the origin (0, 0), but only one is scaled by 0.5

Therefore, the graph of the function [tex]F(x) = \frac{1}{2} x^2[/tex] is plotted below

Learn more here: https://brainly.com/question/11279935

I only get one (2, 11)

to find the points which are solutions, substitute the x-coordinate into the equation and if the value obtained equals the y-coordinate of the point then it is a solution

(7, 16) : y = (3 × 7 ) + 5 = 21 + 5 = 26 ≠ 16

( - 2, 1): y = (3 × - 2) + 5 = - 6 + 5 = - 1 ≠ 1

(2, 11) : y = (2 × 3) + 5 = 6 + 5 = 11

( - 7,16 ): y = (3 × - 7) + 5 = - 21 + 5 = - 16 ≠ 16

the only point from the given list that is a solution is (2 , 11)

By substituting the x and y values of the given points into the equation 'y = 3x + 5', we can determine that the only solution from the given points is (2,11).

The given equation is y = 3x + 5. We can find out which of the points are solutions to the equation by substituting the x-coordinate and y-coordinate of each point into the equation. If the equation holds true, then the point is a solution.

So, the points that are solutions to the equation y = 3x + 5 are (2,11).

https://brainly.com/question/32789785

#SPJ11

A. hope this helps. Mark as Brainliest.