Mathematics Middle School

Which expressions are quadratic expressions? Check all that apply.

z2
2x + 7x – 10
2x2 + 9x – 7
500(0.25)t – 1
13x3 + 21x2 – 5

Answers

Answer 1

Answer:

2x + 7x – 10

2x2 + 9x – 7

Step-by-step explanation:

Related Questions

Find the missing angle in a triangle with the given sides.

Answers

Answer: 72 degree

Step-by-step explanation:

By Angle Sum Property,

53 + 100 + angle C = 180

153 + angle C = 180

angle C = 180 - 153

       =    72 degree

Hope it helped u,

pls mark as the brainliest        - Ayaan707 for help -

^_^

Answer: 27

Step-by-step explanation:

The full triangle has to equal 180

Which list could represent the four angle measures of a quadrilateral if one angle measures 125°?

A. 10°, 10°, 125°, 125°
B. 15°, 15°, 25°, 125°
C. 15°, 15°, 115, 125°
D. 55°, 55°, 125°, 125°

Answers

Answer: D

Step-by-step explanation:

The sum of the interior angles of a quadrilateral is 360°.

55+55+125+125=360

Answer:

D. 55, 55, 125, 125

Step-by-step explanation:

To solve this problem we first need to know what the total degrees of a 4 angle quadrilateral is. The answer to this is 360°. Knowing this, we need to figure out which combination of numbers adds up to 360. To do this, I go through the list and check all of the options.

A.) 10+10+125+125=270

B.) 15+15+25+125=180

C.) 15+15+115+125=270

D.) 55+55+125+125=360

See attachment for questions.

Answers

The solution is attached. I hope it helps

Alana's hair grew 2 inches in 5 months, how many inches will her hair grow in 1 year?

Answers

4.8 inches in one year

Answer: 4

Step-by-step explanation:

First, get 2 and 5 together 2/5 ad than 1 year is 2 of the 5 months so that is 10 so your equation should look like 2/5 = i/10 then cross multiply 2x10=20 5xi = 5i now your equation looks like 5i = 20 divide 5 on both sides and your answer is i = 4.

11. What number is NOT between 1.5 and 1.75?
a. 1 1/4
b. 1.73
c. 1.62
d. 1 13/25

Answers

Answer:

A

Step-by-step explanation:

The difference between the two roots of the equation 3r2+10x+c=0 is 4 2/3. Find the solutions for the equation.

Answers

Answer:

4 2/3 positive and negative

Step-by-step explanation:

If angle A measures 40° what is the measure of angle B?

Answers

the cap is at 360*

so you can find the difference

360 - 40.

and the solution should get you the answer which is 320*
The answer would be 320 degree angle

Cheryl has a 14-foot pole that she wants to cut into 4 equal pieces to help support her tomato plants.
How long should she cut each piece?

Things to mark:
A. 3.4 ft
B. 3.5 ft
C. 4.4 ft
D. 4.5 ft

Answers

B 3.5 divide 14 and 4 to get 3.5.
The answer would be B. 3.5 ft

Which number is an irrational number?

A. √100

B. 1/8

C. --2.2675

D. 3√16

Answers

the answer is d. it isn’t an exact number

Answer:

D, 3√16

Step-by-step explanation:

Got a 100%

In a magic square, the sum of the numbers in any row, column, or diagonal is the same. The square below is a magic square. Two of the numbers were taken out and three were covered by the letters A, B, and C. What is the value of A + B + C?


a.14
b.25
c.Impossible to tell
d.41
e.30

Answers

answer: c
hope this helps you out & i’m not 100% sure if this is right so sorry if u get it wrong .

See attachment for question, please help asap

Answers

Answer:

7/256

Step-by-step explanation:

an = a1 * (1/2)^n-1

a9 = 7(1/2)^9-1

a9 = 7(1/2)^8

a9 = 7/256

I need help!!
Determine if these questions are valid conclusions for sampling or if their invalid. (why or why not)

Answers

Answer:

1st is valid 2nd is not valid

Step-by-step explanation:

if i tossed a coin two times and the results are heads and heads. What is the probability in fraction form?

Answers

Answer:

Hshhsbsbzbzbxbdbdbddns

Please help me this due at 150

Answers

The answer is B. Because the number would be in between

Help, the pic is below thanks.

Answers

I was gonna answer it but I really don’t understand it so sorry

Mr. Salazar assigns the same number of homework questions each school day. The ratio table below shows the total number of homework questions assigned after a certain number of school days.
Homework
Number of days
Total number of questions
4
20
8
40
11
55
16
?

After 14 days, how many total homework questions have been assigned?
60
80
95
115

Answers

Answer: 80

Step-by-step explanation:

Looking at the ratios in the table, the number of days to number of questions is 1:5 (4x5=20; 8x5=40;11x5=55). So for 16 days it will be 16x5=80

I agree that the answer is 80

pls help due in 10 mins

Answers

Answer:

D. 351

Step-by-step explanation:

multiply the side lengths, 24 x 9 = 216

9 x 15 =135

Write an integer to represent each situation:
Jillian deposited $47 he received for his birthday

Answers

I think the answer would be -47$
the answer to ur question is -47

Plz help me i will give you brainliest

Answers

Answer:

#2 10 bags

#3 0.882

#4 0.952

Step-by-step explanation:

The person above is correct

(95+78+89+98)÷4=90 written in a inequality equation

Answers

Answer:

90 ≥ (95+78+89+98) ÷ 4

Step-by-step explanation:

It shows that to get 90, it has to be greater than or equal to (95+78+89+98) ÷ 4

The cost to hire a plumber for x hours is shown on the graph. For this graph, what does the y-intercept of the line of best fit mean in terms of the context?

Answers

The y-intercept represents the flat charge to hire the plumber

Explanation: The y-intercept is 0 hour, which can represent flat charge

Answer:

.

Step-by-step explanation:

George decided to paint a wall with two windows. Both windows are 3 1/2 ft by 4 1/2 ft rectangles. Find the area the paint needs to cover.


Area of 2 windows:


Area of the entire wall:


Area to be painted:

Answers

71.5 ft , 3.5*4.5*2= 31.5(two windows) and the area of the whole wall is 103ft just subtract both to get 71.5ft needs to cover with paint.

A mint produces 150,000 souvenir coins each year. In a random sample of 400 coins, 3 have a misprint. Predict the number of coins that will have misprints in a year.

Answers

150,000 / 400 = 375. 375(3)= 1,125 misprints per year. hope this helps!

Who ever answers first gets a brainliest A rectangular prism is 14 feet long and 10 feet high. Its volume is 1,680 cubic feet. What is the width of the rectangular prism?

Answers

Answer:

The width is 12 feet.

Step-by-step explanation:

If you divide 1,680 by 14 it will give you 120 then divide that by 10 it will give you 12 ft.

Pls help last question lol

Answers

You add up all the sides, which you get 22 fir your answer

Is this supplementary, Complementary, a vertical angle, or none of the the above?

Answers

Answer:

Supplementary Angle

Step-by-step explanation:

If you add the angles "a" and "b" together you get an angle of 180º.

A supplementary angle is an angle that adds up to 180º.

A complementary angle is an angle that adds up to 90º.

A vertical angle has two lines that intersect (like an "X".

can someone help?
(no files or links)
(Will give brainliest)

Answers

1 3/4 because it you add it you will get that that’s the answer
2 1/3+1 3/4+ x= 6 3/4. 2 2/3 is the answer.

helpppp

anyone!? :<
___________________________________________________
1. Write the multiplication sentence modelled by the shaded region in each rectangle.
|A. | B. |C. |D.
______________________________________

3. Tom took of a pie. He could only eat of what he took.
What fraction of the pie did Tom eat?

''Hint: 1/2 of 3/4 is 1/2 x 3/4.''
___________________________________________________

PLZZZ DO BOTH!! :( ITS DUE TW

Answers

Answer:

First page;

a. 2/3x1/2=1/6

b. 1/4x2/5=2/20

c. 1/3x1/3=1/9

d. 1/2x5/6=5/12

Second Page:

a. 1/4x3/4=3/16

b. 1/2x2/3=2/6

Step-by-step explanation:

Hope this helps :) have a good day or night!!!!

Im still not sure, can someone help me?

(I will give brainliest)
(NO LINKS OR FILES)

Please!

Answers

Answer: 9 associate property 8 commutative property

Step-by-step explanation:

what is the mean of 5 7 7 5 1 0 6 8 5 9 8

11 points

Answers

Answer:

add all the numbers and divide then by how many numbers there are in the data.

Step-by-step explanation:

5+7+7+5+1+0+6+8+5+9+8=61

how many numbers are in the data? 11

divide 11 and 61.

61/11=5.54

mean=5.54 (54 repeats. 5.5454545454545 etc.)

5.54 you add up all the numbers and than divide by how many there are!!!
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