[please help im studying for my test and i dont understand how to do this]​

Answer:

-3x^2+11x+2

Step-by-step explanation:

hope this helps!

Answer:

Step-by-step explanation:

Target equation is

Comparing this with situations below

The price of 9 books is $20 more than the price of 4 books. What is the price of a book?

The price of 4 books is $20 more than the price of 9 books. What is the price of a book?

The price of 9 books equals $24. What is the price of a book?

Joyce bought x number of $4 books and $9 books. She spent $20. How many books of each price did she buy?

Answer:

[tex]x = 13[/tex]

Step-by-step explanation:

Given

See attachment

Required

Find x

From the attachment, we have:

[tex]BC = x + 4[/tex]

[tex]BD = 2x - 7[/tex]

[tex]GE = 51[/tex]

[tex]GF = 57[/tex]

Because both triangles are similar, we use the following equivalent ratios:

[tex]BC : BD = GE : GF[/tex]

Substitute values for each parameter

[tex]x + 4 : 2x- 7 = 51 : 57[/tex]

Convert to fractions

[tex]\frac{x + 4}{2x- 7} = \frac{51 }{ 57}[/tex]

Simplify the right-hand side

[tex]\frac{x + 4}{2x- 7} = \frac{17}{19}[/tex]

Cross Multiply

[tex]19(x + 4) = 17(2x - 7)[/tex]

[tex]19x + 76 = 34x - 119[/tex]

Collect Like Terms

[tex]19x - 34x = -76 - 119[/tex]

[tex]-15x = -195[/tex]

Solve for x

[tex]x = \frac{-195}{-15}[/tex]

[tex]x = 13[/tex]

Answer: x=13

Step-by-step explanation:

:(x+4) 57 = (2x-7) 5157x + 228 = 102x - 357357+228 = 102x - 57x585 = 45x13 =

Answer:

the next term will be V50

Answer:

v40

Step-by-step explanation:

Answer:

-10

Step-by-step explanation:

Answer:

= -10

Step-by-step explanation:

-7 + (-3)

=

-7 - 3

-10

Answer:

False

Step-by-step explanation:

Hope this helps :)

x=12,y=12√3

sin60=y/24

√3/2×24=y

y=12√3

again

24^2=x^2+y^2

576=x²+12×12×3

x²=576-432

x=√144

x=12

Answer:

d ≈ 10.5

Step-by-step explanation:

The formula for the diagonal of a retangular prism (cuboid) is

[tex]d=\sqrt{l^2+w^2+h^2}[/tex]

1.) Plug in all the values for l, w, and h

[tex]d=\sqrt{5^2+6^2+7^2}[/tex]

2.) simplify by squaring the terms inside the square root

5 * 5 = 25

6 * 6 = 36

7 * 7 = 49

[tex]d=\sqrt{25+36+49}[/tex]

3.) Add the terms

[tex]d=\sqrt{110}[/tex]

4.) Simplify

[tex]d = 10.488[/tex]

5.) Round to one decimal place

d ≈ 10.5

Answer:

Answer is c. I, II and II

Step-by-step explanation:

Solution:

Answer is c. I, II and II

It will be increase by 10 points and it will be 10 points higher than the median for the noncurved data. and it will be halfway between Q1 and Q3 for the curved data.

Median for noncurved data = Q2 = 80

Median for curved data = 90

It will increase by 10 points = 90  

It will be 10 points higher than the noncurved data = 90-80 = 10 points

if the set contains 20 values then, noncurved data will be:

60 _ _ _ _ 70 _ _ _ _ 80 _ _ _ _ 87 _ _ _ _ 95

Curved data will be: (all grades increased by 10 points)

70 _ _ _ _ 80 _ _ _ _ 90 _ _ _ _ 97 _ _ _ _ 105

Here, we can see median = Q2 = 90, exactly, halfway between Q1 =80 and Q3 = 97

Hence, C is the right answer

Answer:

-19

Step-by-step explanation:

60/2-7²

30-49

-19

Answer: 8

Step-by-step explanation:

Answer:

2,840

Step-by-step explanation:

since the three is in the tens place and 7 in single if 5 and up round up fi 4 and below leave it alone you will then take the 3 and round up to give you 2,840

Answer:

-3x(-2)+15

Step-by-step explanation:

add the numbers

Step-by-step explanation:

the answer is in the picture

Answer:

The variable, the number of golf balls, is modeled by an orange x tile.

Finding 8 more golf balls is modeled by 8 orange + tiles.

The expression that represents the situation is x + 8.

Answer:

$760

Step-by-step explanation:

Given data

weekly = $325

commission= 7.5%

if she sold $5,800 worth of merchandise

Her earnings will be

Week earning= base salary+ 7.5% of sales

Week earning= 325+ 7.5/100*5800

Week earning= 325+ 0.075*5800

Week earning= 325+ 435

Week earning= $760

Answer:

6

Step-by-step explanation:

I

did quiz.

The net of the solid is a plane shape, and The net of the solid is made from 6 faces

From the question, we understand that:

So, the number of faces is:

Face = Triangle + Pentagon

This gives

Face = 5 + 1

Face = 6

Hence, the net of the solid is made from 6 faces

Read more about surface areas at:

https://brainly.com/question/6613758

#SPJ2

Answer:

my teacher has cancer please help her at #snowmanchallenge

Step-by-step explanation:

try to spread the help every snowman is ten dollars for her

Answer:

141036.25

Step-by-step explanation:

Answer:

141036.25

Step-by-step explanation:

Answer:

1/5

Step-by-step explanation:

you're dividing by -5

Answer:

Go turn a light on.

Step-by-step explanation:

Flip the light switch

Answer:

y = 2x+3

Step-by-step explanation:

You can see that the line crosses the y-axis at (0,3), so the y-intercept is 3.

To find the slope, compare the coordinates of the two points marked on the line,  (0,3) and (-3,-3).

slope = Δy/Δx = ((-3)-3)/((-3)-0) = (-6)/(-3) = 2

Slope-intercept equation for line of slope 2 and y-intercept 3:

y = 2x+3

Answer:

We conclude that the length of LM if L(3,4) and M(1,-2) will be:

[tex]d = 6.3[/tex]

Hence, option D is correct.

Step-by-step explanation:

Given

Determining the length of LM

The length of the distance between (x₁, y₁)  and (x₂, y₂)  can be determined using the formula

[tex]d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}[/tex]

substituting (x₁, y₁) = (3, 4) and (x₂, y₂) = (1, -2)

   [tex]=\sqrt{\left(1-3\right)^2+\left(-2-4\right)^2}[/tex]

   [tex]=\sqrt{2^2+6^2}[/tex]

   [tex]=\sqrt{4+36}[/tex]

   [tex]=\sqrt{40}[/tex]

   [tex]=\sqrt{4\times 10}[/tex]

   [tex]=\sqrt{2^2\times \:10}[/tex]

   [tex]=2\sqrt{10}[/tex]

   [tex]=6.3[/tex]

Therefore, we conclude that the length of LM if L(3,4) and M(1,-2) will be:

[tex]d = 6.3[/tex]

Hence, option D is correct.

Answer:

6 ft < L₃ < 30 ft

Step-by-step explanation:

To obtain the answer to the question given above, we must bear in mind that:

The sum of the length of two sides of any triangle is always greater than the 3rd length i.e

L₁ + L₂ > L₃

With the above information in mind, we can obtain the answer to the question given above as follow:

Length 1 (L₁) = 12 feet

Length 2 (L₂) = 18 feet

Length 3 (L₃) =..?

Case 1:

L₁ + L₂ > L₃

12 + 18 > L₃

30 > L₃

L₃ < 30 feet

Case 2:

L₁ + L₃ > L₂

12 + L₃ > 18

Collect like terms

L₃ > 18 – 12

L₃ > 6 feet

Thus,

6 feet < L₃

Combining case 1 and 2,we obtained:

6 ft < L₃ < 30 ft

Therefore, the possible Lenght of the 3rd side is : 6 ft < L₃ < 30 ft

Answer:

A

Step-by-step explanation:

Answer:

Step-by-step explanation:

Step-by-step explanation:

129

hope it helps

please mark me as brainlist

Answer:

it is 129

Step-by-step explanation:

Answer:

d. 80

Step-by-step explanation:

Similarity ratio of ABCD to EFGH = 4:3.

This implies that the ratio of AD to EH = 4:3

If EH = 60, then:

AD:60 = 4:3

AD/60 = 4/3

Multiply both sides by 60

AD = ⁴/3 × 60

AD = 80

Answer: No, it is not commutative. If used a square as an example, centered at (1,1). If a dilation is performed on the square of a scale factor of 3, and the square is translated 5 units downward, then the result would be different than if I switched the order, doing the translation downward first and then performing the dilation centered at (1,1).

I hope this helps! If you need any further clarification, just let me know below. Thanks! Have a good day, and good luck on your assignment. :)

Answer:

this helps me :-))

thanks

Answer:

X = 4

Step-by-step explanation:

That traingle is an isosceles triangle. You know this because the base angles, 45 and 45 are the same. Another characteristic of an iscosceles traingle is that the base sides ( in this case 4 and X ) are always the same