What is 75% of 400? Write and evaluate an expression
to find the answer. Then explain how to use the model
to justify the answer.

Step-by-step explanation:

Expression = x + 2x + 7 + 3x + 1

Simplication

x + 2x + 7 + 3x + 1

6x + 8

Answer:

-0.2x=40

Step-by-step explanation:

-0.58x+0.38x=4.8

Combine like terms:

-0.2x=4.8

That’s for the answer, but if you want to go further, divide -0.2 to both sides:

x=24

Answer:

9 hours

Step-by-step explanation:

Answer:

4x+1 =6x-13

6x-4x=13+1

2x=14

x=14/2

x=7

Step-by-step explanation:

the answer will be 7

hence proved

Answer:

3 have only been in ballet

Step-by-step explanation:

If

5 have been in ballet

9 have been in play

2 have been in both ballet and a play

Then

3 have only been in ballet

7 have only been in a play

Answer:

4 students

Step-by-step explanation:

add 2 + 5 = 7

add 9 + 2 = 11

subtract 11 - 7 = 4

there was 2 students added to the 5 students, there was 2 students added to the 9 students/ Sorry if incorrect, i worked it out 4 times.

Answer:

x = -2/7 or

x = 6/7

Step-by-step explanation:

|7x-2| + 3 = -1  subtract 3 from both sides

|7x-2| = -4 now there are two probabilities

7x-2 = -4 or

7x-2 = 4 if first probability the value of x would be:

7x-2 = -4 add 2 to both sides

7x = -2 divide both sides by 7

x = -2/7 for the second probability the value of x would be:

7x-2 = 4 add 2 to both sides

7x = 6 divide both sides by 7

x = 6/7

Answer:

[tex]10 \times 9 - x \\ x = 10 \times 9 \\ x = 90[/tex]

Answer:

[tex]$x=\frac{-1}{5},[/tex]

[tex]y=\frac{2}{5},[/tex]

[tex]z=3$[/tex]

Step-by-step explanation:

Given system of equations in the form of the matrix shown below,

[tex]$A=\left[\begin{array}{ccc}1 & -2 & 0 \\ 1 & 3 & 5 \\ 1 & -1 & -1\end{array}\right] \quad B=\left[\begin{array}{c}4 \\ -1 \\ 3\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{ccc}1 & -2 & 0 \\ 1 & 3 & 5 \\ 1 & -1 & -1\end{array}\right]\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\left[\begin{array}{c}4 \\ -1 \\ 3\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\frac{1}{-10}\left[\begin{array}{ccc}2 & -6 & -4 \\ -2 & -1 & 1 \\ -10 & 5 & 5\end{array}\right]\left[\begin{array}{c}4 \\ -1 \\ 3\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\frac{1}{-10}\left[\begin{array}{c}8+6-12 \\ -8+1+3 \\ -40-5+15\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\frac{1}{-10}\left[\begin{array}{c}2 \\ -4 \\ -30\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\left[\begin{array}{l}\frac{2}{-10} \\ \frac{-4}{-10} \\ \frac{-30}{-10}\end{array}\right]$[/tex]

[tex]$\left[\begin{array}{l}x \\ y \\ z\end{array}\right]=\left[\begin{array}{c}-1 / 5 \\ 2 / 5 \\ 3\end{array}\right]$[/tex]

Learn more about matrix refer:

Answer:

0.1875, or [tex]\frac{3}{16}[/tex]

Explanation:

Using the formula [tex]a_n=\frac{24}{2^{n-1} }[/tex], where [tex]n = term[/tex], we find

[tex]a_8 = 0.1875[/tex]

Answer:

a rotation of 180° about the origin

B is the answer for this question due to the value of root and that's is root under 20

Answer:

Point B represents the location of

[tex] \sqrt{20} [/tex]

Step-by-step explanation:

As the value of under root 16 is 4 and the value of under root 25 is 5

So the location of under root 20 will be in between 4 and 5 on the number line

.

.

.

Hope it helps

Step-by-step explanation:

Since all side lengths of smaller squares are equal, we have

[tex]3x+4=4x-1[/tex]

[tex]x=5[/tex]

Since length of AB is twice of the side length of smaller squares,

[tex]\bar{AB}=2(3x+4)=2(3\cdot5+4)=38[/tex]

Answer:

AB=38

SEE THE IMAGE FOR SOLUTION

Answer:

19. - 3

20. -7

Step-by-step explanation:

I think

x = - (b/2a)

= -(24/8)

= - 3

and the value or c is -7 not 7

CMIIW

Answer:

Step-by-step explanation:

Domain means what is the lowest value of x on the graph and what is the highest. Our graph begins at an x value of -5 (but -5 is not included because the dot is not filled in) and goes all the way up to 2 (but 2 is not included either since the dot is not filled in. Therefore, the domain is

D = {x | x ∈ R, -5 < x < 2}

which means that the domain is in the set of real numbers that begin at -5 and end at 2, neither included.

Choice F is the one you want.

Step-by-step explanation:

f(x) = 3x - 7

f (-2w + .5) = 3(-2w + .5) - 7

= -6w + 1.5 -7

= -6w - 5.5

Answer:

he quotient has a remainder of 4.

The quotient has a remainder of 14.

The quotient has no remainder.

The quotient has a remainder of 12.Step-by-step explanation:

Answer:

-3+4=1

Step-by-step explanation:

Start with whichever arrow starts from 0

Step-by-step explanation:

If the figure is triangle then,

Let PR be x

So,

PQ+QR+PR= 180 (Sum of all the angles of the triangle)

Therefore,

6x+25+16-3x+x=180

4x+36=180

4x= 180/36

x= 144/4

X= 36

NOW,

PQ= 6x+25

= 6(36)+25

= 216+25 = 241= PQ.

QR = 16-3x

= 16-3(36)

= 16-108

= -92

PR = 36

hope it helps

Answer:

PR = 36

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

[tex]5x-6-x=2x+2\\\\5x-x-2x=2+6\\\\2x=8 \ \ /:2\\\\x=4\\\\\huge\boxed{\text{There is one solution at x=4}}[/tex]

Answer:

There is one solution at x+4

Step-by-step explanation:

the answerrrrrrr is

356.85

Answer:  (1.125,-0.25)

Step-by-step explanation:  The point that is the same for both equations is the point where they intersect.  It appears from the graph to be around (1,0).  We should confirm this by deriving the equation for each line and then solving them.  Use the standard format:  y = mx+b, where m is the slope and b the y-intercept.

I calculate the 1st line (angled down to the right) to have a slope (m) of -2 [y drops 2 for every increase of 1 for x).  The y intercept is 2 (b).  This equation would be y = mx+b, or y = -2x + 2.

The second line has a positive slope of 2/3 and a y intercept of -1, y = (2/3)x-1

Set these two equations equal to each other and solve for x.

-2x+2=(2/3)x-1

x = 1.125

Use that value of x to solve for y:  y = -0.25

The point of intersection is therefore (1.125, -0.25)

Answer:

[tex] \frac{5}{20} = \frac{1}{4} = \frac{10}{40} \\ thank \: you[/tex]

Answer:

B. –48

Step-by-step explanation:

Answer:y=-48

Step-by-step explanation:

4*(2*-6)=-48

Answer:

The correct answer is y= 1/16

Step-by-step explanation:

2^-6 is 1/64 multiplied by 4 is 1/16

Substitute the value of the variable into the expression and simplify.

( − 6 , − 48 )

Answer:

G.$3.15

Step-by-step explanation:

Step 1-

The estimate for the given situation for the amount is $35, the sales tax of the stuffed elephant is:

=35 x 0.09 -  Multiply by the decimal 9%

=$3.15 - Multiply the values

Result- G.$3.15

Answer:  the absolute value of -5, 0.25, 0.25, -2.5, -1 1/5, -4

Step-by-step explanation:

Answer:

-17

Step-by-step explanation:

First, let's see what the value of w is, by solving -5w - 5 = 5.

-5w - 5 = 5            Add 5 on both sides.

-5w = 10                Divide -5 on both sides.

w = -2

Now, we know that w is equal to -2, let's plug it in to find the value.

9(-2) + 1                 Distribute.

-18 + 1                    Add.

-17

2x + 4a = 10

2x = 10 - 4a

x = 5 - 2a

Answer:

A. The weight of the apples is a function of their cost.

Step-by-step explanation:

In the graph it shows the more the apples weight the cost increase, therefore A is your answer.

Answer:

GCF is 8

32x - 24 = 8(4x - 3)

Step-by-step explanation: