Mathematics Middle School

Select the correct answer.

Which equation could be solved using this application of the quadratic formula?

x=-8±√8²-4(3)(-2) / 2(3)

Answer choices are:

A. -2x² − 8 = 10x − 3
B. 3x² − 8x − 10 = 4
C. 3x² + 8x − 10 = -8
D. -2x² + 8x − 3 = 4

Answers

Answer 1
Pretty sure it will be C

Related Questions

Find the x-intercept of the function y=−0.2x+0.55

Answers

Answer:

2.75

Step-by-step explanation:

y=0

−0.2x+0.55=0

0.2x=0.55

x=2.75

Answer:

x=-2.75

Step-by-step explanation:

Plug y=0 into the equation and solve for x:

y=-0.2x+0.55

0=-0.2x+0.55

-0.55=0.2x

-2.75=x

Therefore, x=-2.75

an elevator traveled up 8 floors and then down to the second floor. how many floors did the elevator travel down?

Answers

If the elevator went up 8 floors and then down to the second floor, then you have to do 8-2=6

write ur solution as an inequality: if 3

Answers

I think the answer to you question would be -3 I’m not sure but I hope this works :)
-3 is the answer for you me question

Jade buys a blouse and a skirt for 34 of their original price. She pays a total of $31.50 for the two items. If the original price of the blouse is $18, what is the original price of the skirt?

Part A

Which equation represents the situation?
0.75s = 31.50
34(18s) = 31.50
0.75(s + 31.50) = 18
34(18 + s) = 31.50
Part B

Use the Distributive Property to solve the equation.
Enter your answer in the box.

$

Answers

Answer:

`Part A:

D. 3/4(18 + s) = 31.50

Part B:

$36

Step-by-step explanation:

I think 34 is 3/4, is that right?

here, s is the cost of the skirt

Part A: The answer would be:

3/4(18) + 3/4(s) = 31.5 =

3/4(18 + s) = 31.5

Part B: 3/4(18) + 3/4(s) = 31.5

4.5 + 3/4s = 31.5

Subtract 4.5 from both sides:

3/4s = 27, 27 is the cost of the skirt now, but we need the original price.

multiply both sides by 4/3:

s = 36

I really need help finding the surface area

Answers

There are 4 triangles and the formula for the area of a triangle is 1/2BH so 11x10 is 110 and then take half of that and you’ll get 55. Since there are 4 triangles you need to then multiply that by 4 to get 220. And then you have to find the area of the square base which is 11x11 which will come out to 121. So you add the 220 and 121 to get 341.

17. If the radius of a circle equals $$ cm, find its circumference correct to three decimal places.

Answers

I do not know what “$$” is, but you need to find half of that to get the diameter then multiply by pi to get the circumference so it’s be
1/2($$)•pi

Solve the given equation.

v + 13 = 40
what is v

Answers

V = 37

Step-by-step explanation:

40-13 =27
27+13=40
v=27

A right rectangular prism has a length of 2 ½ feet, a width of 3 feet, and a height of 1 ½ feet. Unit cubes with side lengths of ½-foot are added to completely fill the prism with no space remaining. What is the volume, in cubic feet, of the right rectangular prism?

Answers

Answer:

n=90

Step-by-step explanation:

As I think it is easy to answer the volume of prism I will also calculate no of small prism that can fit inside the larger one  

so volume = length * width * height

volume of larger prism

vp=45/4 ft^3 =11.25

volume of small cubes

vs=1/2*1/2*1/2

vs=0.125 ft^3

now numbers of cube that can fit

n=vp/vs

n= 11.25/.125

n=90

so 90 smaller cubes will completely fill in the prism

Answer:

11.25 [tex]ft^3[/tex]

Step-by-step explanation:

2.5 x 3 x 1.5 = 11.25 [tex]ft^3[/tex]

51. Find the length of the unknown side x of this triangle, evaluate your answer to two decimal places.

Answers

Answer:

See work, below.

Step-by-step explanation:

The radius of this circle is 10 and so the diameter is 20.  The measure of the angle opposite side x is found as follows:

                      adj side

 cos theta = ------------------- = 18/20.  Find theta:

                      hypotenuse

theta = arccos 18/20 = 0.451 radian.

Now use the sine function to find x:

                                          x                       x

sin 0.451 radian      = ------------------- = ------------- = 0.651

                                    hypotenuse          20

which results in x = 20(0.651) = 13.02

x = 13.02 units

I should have used the Pythagorean Theorem up front.

18² + x² = 20² becomes x² = 400 - 324 = 76, and so x = √76 ≠ 8.72

CAN SOMEONE HELP ME I DONT KNOW WHAT IM FREAKING DOING

Answers

Answer:

18 qts

Step-by-step explanation:

Since 1 gallon=4qts, you would multiply the gallons by 4 to reach your answer. 4.5 gallons=18qts

Answer:

It would be 18 quarts

Step-by-step explanation:

Hope this Helps!

The number of toys owned by eight classmates is shown below:


4, 3, 4, 5, 6, 6, 8, 4


Part A: What is the mean of the data? Show your work.


Part B: Use your answer from Part A to calculate the mean absolute deviation for the data. Show your work.

Answers

Answer:

Part A: 5  

Step-by-step explanation:

4+ 3+ 4+ 5+ 6+ 6+ 8+ 4= 40

so there is 8 numbers which means that we need to do 40 divided by 8=5

Part b: i dont know how to explain but the mad is  1.25.

The mean of given data is 5 and mean deviation is 1.25

What is mean deviation?

The mean deviation is defined as a statistical measure that is used to calculate the average deviation from the mean value of the given data set.

Mean = Sum of all observation/ Number of observation

         = 40 / 8

         = 5

X                F                XF            |[tex]d_{i}[/tex]|             FD

3                 1                  3              2               2

4                 3                 12             1                3

5                 1                   5             0               0

6                 2                  12            1                2

8                 1                   8              3              3

Mean Deviation = ∑FD/n

                            = 10/8

                            = 1.25

Thus, The mean of given data is 5 and mean deviation is 1.25

Learn more about Mean deviation from:

https://brainly.com/question/10528201

#SPJ2

Angle relationship-error analysis

Answers

Answer:

23

Step-by-step explanation:

Answer:

yo

Step-by-step explanation:

yo

The traffic-control monitor on the freeway shows 200 vehicles per minute passing the camera in 5 minutes. Of those vehicles, on average, 125 have one passenger, 60 have four or fewer passengers, and 15 have more than four passengers. What is P(vehicles with more than four passengers)?

Answers

Answer: maybe 7.5

Step-by-step explanation: I don't really know the question isn't real clear

A. It shows the unit rate of the graph in hours per mile
B. It shows the unit rate of the graph in miles per hour.
C. It shows the time, in hours, it takes the towboats to travel in 1 mile.
D. It shows the distance traveled, in miles, by the towboat after 5.25 hours.

Answers

I think the Answer is D
The answer is B because the hours would be the bottom intervals of 1 and the distance traveled (in miles) is the constant of 5.25. So, overall in one hour, you would’ve traveled 5.25 miles. (It’s like driving a car... you’d be going at a speed of 5.25 mph (which is kinda slow).

Will give brainlest if correct, and 5 stars.

Solve for x

Answers

Answer:

the answer is 10

Step-by-step explanation:

92+78=170

180-170=10

theres 180 beacuse every straight line has the angle of 180

Answer:

x = 10

Step-by-step explanation:

These 3 angles are supplementary so they all equal 180:

92 + x + 78 = 180

x + 170 = 180

x = 10

select all the expressions that are equivalent

2 + 6k
16k + 18
8k - 2
6k + 2

Answers

Answer:

2+6k

6k+2

Step-by-step explanation:

Answer:

The expressions that are equivalent are: 2 + 6k and 6k + 2

Step-by-step explanation:

No matter in what order a function is written (weather the integer is first or the variable), it will always be equivalent.

Hope this helps!

what is the area of the triangle?

Answers

Answer:

S = S(ABCD) - S(BCE) - S(AED) = 7*6 - 2*6/2 - 5*6/2 = 42 - 6 - 15 = 21

Step-by-step explanation:

If we look at the picture, we can notice that the area we are interested in is S(ABCD) - S(BCE) - S(AED). Y-axis is parallel to AB line since the coordinates of the A and B points have the same X-axis value.

The following calculations happend for figuring out the width for each line:

AB = | -3 - 4 | = 7BC = | -4 - 2 | = 6CE = | 4 - 2 | = 2ED = | 2 - (-3) | = 5AD = | -4 - 2 | = 6

The formulas for each figure area:

S(ABCD) = AB * BCS(BCE) = BC * CE / 2S(AED) = ED * AD / 2
i agree that it is 21

Which of the following is a rational number but NOT an integer?
4
-8
13/2
2.498546426537 ......

Answers

Answer:

d option is the correct option because it can be expressed as fraction

D is the correct answer why becuz it just is

number one please no links

Answers

12 forksKnives = xForks = 2xSpoons = 2xx + 2x + 2x = 305x = 30x = 6Knives = 6Spoons = 12Forks = 12Please let me know if I am wrong.
12 forks


It’s pretty self explanatory

Help me with this pls!
Side note: tell me your favorite big time rush member
if you type mine, ill give you a brainliest

Answers

Answer:

kendall cause he is from the same state as me

Step-by-step explanation:

The answer is 1 i think

Carlos cuz he had the helmet

If it cost $1.68 for 3 bars of chocolate, what is the unit rate?

Answers

the unit rate is $0.56 /chocolate bar
56 cents because 168/3 is 56

questions in the files! please answer fast i will give brainless if you answer all of them!

Answers

The answer would be
1- b and d
2-A
3-the function has a greater slope
4-A
5-Bestest buddy
4= A and the rest not sure

Please i need help!!

Answers

Answer:

Option B is correct

Step-by-step explanation:

because when you compare the table with graph you can understand easily.

Option B would be correct because if there is one cat that has the frequency of two dots, two cats have the frequency of 3 dots, three cats have the frequency of 1 dot, and 4 cats have the frequency of 4 dots, then it would be correct.

HELP ME PLS PLS PLS and thank you pls do it quik

Answers

1331 is the answer my guy

Answer:

Sorry, I'm late

Step-by-step explanation:

It would be D because it would be 11 cubed or 11 to the third power. So 11x11x11. 11x11=121. 121x11=1,331

HELP ME PLSSSS
The Wheel Shop sells other kinds of vehicles. There are bicycles and go-carts in a different room of the shop. Each bicycle has only one seat and each go-cart has only one seat. There are a total of 21 seats and 54 wheels in that room. How many are bicycles and how many are go-carts? Explain how you figured it out.

Answers

substitute for x and y in wheels equation
2*15 + 4*6 = 54
30 + 24 = 54
54 = 54 = ok
-----
answer is:
number of bicycles is 15
number of go karts is 6
-----

Tell whether the angles are complementary or supplementary. Then find the value of x.

this just confused me a bit. x - 20? They are complimentary so ik the other side has to be 20

Answers

As you should already know that the angle shown is 90°.

So,

x + (x - 20) = 90

Now we have to solve for x. To find x we need to isolate it (get it by itself)

Add 20 on both sides:

x + x = 110

Simplify:

2x = 110

Now divide 2 on both sides (to get x by itself)

x = 55


Let’s check our answer:

55 + ( 55 - 20) = 90

55 + 35 = 90

90 = 90

So your answer should be x = 55.

A prism has a cube-shaped hole in the middle of it. The cube measures 3 cm by 3 cm by 3 cm. What is the volume of the prism?

Answers

Answer:

27 cubic inches :)

Step-by-step explanation:

It’s 27 because 3 x 3 is 9 and 9x3 is 27 so that’s the answer

Need Help Quick Please!
Solve for x.

−1/5 (x − 4) = −2

Enter your answer in the box.

x =

Answers

The answer should be (x-4)2

Anyone know? Please help. I WILL GIVE YOU HALF EATEN CHEETO IF YOU CAN GIVE ME ANSWER

Answers

Answer: y>7-15x

Slope-Intercept Form: Y=MX+B

Eliminate 15x to get only y on one side.

15x-15x=0

y>7-15x

y>7-15x is the answer hope this helps!!

This question is a Circumference (in terms of pi) Can anyone solve it?

Answers

Answer:

26π

Step-by-step explanation:

C=2Πr

r=13

c=2(13)π

=26π

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