Mathematics Middle School

Rosa throws a ball. The equation d = −t^2 + 4t + 5 represents the path taken by Rosa's ball where d is the height of the ball (in feet) after t seconds. How long was the ball in the air?

A. 1 second
B. 4 seconds
C. 5 seconds
D. 9 seconds

Answers

Answer 1

Answer:

B

Step-by-step explanation:

-t²+4t+5=0

t²-4t-5=0

t²-5t+t-5=0

t(t-5)+1(t-5)=0

(t-5)(t+1)=0

t=5,-1

when t=0,d=5

actual time it it is in air=5-1=4 seconds.

Answer 2
If I did the math correctly, it should be B

Related Questions

The perimeter of the triangle below is 89 cm. What is the measure of X?
A. 4
B. 3
C. 8
D. 12

Answers

4 is the right answer.

Step-by-step explanation:

7×4+2=30

6×4+9=33

8×4-6=26

Total=89

4 is the correct answer

help with this plssss

Answers

Answer:

as taught to us it is s is equal to 1 by 6 r

S = 1/6r in my opinion

Riggoletto’s Portraits specializes in making circular portraits of people. A large portrait is 78 in. in diameter. A medium portrait is 26 in. in diameter. Estimate the difference between the areas of the two sizes of portraits. Use 3.14 for . Round your answer to the nearest whole number.

Answers

Answer:

4245

I hope this answer helps!

please help me on these. make sure they are correct <3

Answers

Answer:10

Step-by-step explanation:15/3 is 5 so 5 x 2 equals 10

Answer:

B. 10

Step-by-step explanation:

brainliest please. just tryna rank up

Harper only has $15 to spend at the grocery store. She buys Doritos that cost $2 per bag and one sandwich for $8. Which solution set would represent the options for the number of bags of Doritos she can buy.

Answers

Answer:

2x + 8 ≤ 15

Step-by-step explanation:

Hi,

2x represents the cost for each bag of doritios. The 8 is the cost of the sandwitch. And 15 is how much money she can spend :)

Answer:

2d + 8 ≤ 15

Step-by-step explanation:

Let the amount of Doritos bags be represented by d.

2d + 8 ≤ 15

With this, we can solve.

2(3) + 8 ≤ 15

6 + 8 ≤ 15

14 ≤ 15

The equation is true, and we cannot go any further.

The answer is ≤ 3.

Hope this helps. Have a nice day.

Tamica is making a fruit salad. She spends $3.30 on 6 kiwis, $8.40 on 3 pounds of grapes and $8.54 for 7 bananas.

Answers

He would spend $20.24 because $3.30+$8.40+$8.54= $20.24

Amanda Gorman already has plans to run for President. The expression that gives the year in which she hopes to do this is given by the expression `4n^{2}+100`, where n is her age now.



What year is she planning on running

Answers

Answer:

Im not sure

Step-by-step explanation:

may someone please answer? also provide an explanation

Answers

V=Bh
V=(20ft*5ft)*13ft
V=(100ft)*13ft
V= 1300ft
I think the answer is 1,300
Because the area of the base is 100 so time the height gives you 1,300. I’m not sure I’m right because I don’t pay attention in math but I think that’s right

A line goes through the point (2, 4) and has a slope of 3/2. Which of the following points is also on the line? CHOOSE ALL THAT APPLY


(1, 1)

(3, 7)

(0, 2)

(4, 7)

(0,1)

(0, 0)

Answers

Answer:

(4,7) and (0,1)

Step-by-step explanation:

(7-4)/(4-2) = 3/ 2, and (4-1)/(2-0) = 3/2.

( 0,1) is the answer. you can check this by doing rise over run for (2,4) and (0,1) :)

Find the volume of a sphere with a radius of 4 ft.

A. 33.5 ft3
B. 67.0 ft3
C. 267.9 ft3
D. 803.8 ft3

Answers

i think the answer is C
The volume of a sphere with a radius of 4 is 267.9 ft3 or C.

This is 15 points plz help ( no links ) EXPLAIN YOUR ANSWER plz
( ONLY ANSWER THIS IF YOU KNOW WHAT IT IS )

The answer is NOT C

Answers

The correct answer is c
B
Half the rectangle would be the same as the original triangle so if u find the area of half of it you will get the area of the first triangle:)

Seraph in is comparing the graphs of the parent function y = x^2 and the function y = 6(x − 3)^2 − 8. He makes the following statements about the new function.
• Stretch vertically by a factor of 6.
• Translate 3 units right.
• Translate 8 units up.
Are Seraphin's statements correct? Explain why or why not.
A. No; Seraphin's first statement is not correct. Because the a-value is positive, the graph should be stretched horizontally by a factor of 6.
B. No; Seraphin's third statement is not correct. Because the c-value is positive, the graph should be translated 3 units to the left.
C. No; Seraphin's third statement is not correct. Because the d-value is negative, the graph should be translated 8 units down.
D. Yes; the statements are all correct.

Answers

Answer:

Its C. It would be 8 units up if it said (x-3) + 8 but its -8

Use either the commutative property or combine like terms to create an equivalent expression from the equation 9 x j(2 + 5).

Answers

Answer:

=63jx

Step-by-step explanation:

1) 2+5=7

2) 9 x 7jx=63jx

Expert help: explain the answer please

Answers

It be because he would want more data. I hope this helps for you and I’m very sorry if I get it wrong that was my best try am in eighth grade by the way

Find the perimeter of the trapezoid below.

Answers

You add all of the sides of the trapezoid. The formula for finding the perimeter of a trapezoid is (P=a+b+c+d), so you will have to find the length of the side with no number.

Answer:

62

Step-by-step explanation:

Can someone help? Please?

Answers

Answer:

I believe it might be 30 or 1.2

Step-by-step explanation:

It would've been 6/30 but since is it says it's a whole number you would have to add all the numbers together to get how many marbles you have in all.

I hope this is right, if it's not I'm sorry!

2+2 is 4444444444444

HELP ME AND PLEASE BE FAST

Answers

Answer:

1/32 i believe

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

12+10+4+6=32

32/12 that's sould round up to 3/8

i will mark brainliest if correct and i will lov u forever pls answer <3

Answers

-2 :) jnwksnsmnwkwsmns

Emily, Zeke, Harry, and Brook each conducted surveys on the number of books people have in their homes. Then, each student determined the accuracy of the following statement.

All measures of central tendency must appear as a number in the set of data collected.

Which student’s statement is CORRECT?

A.
Zeke says this is never true because all the measures of central tendency are never numbers in the set of data.

B.
Emily says this is always true because all the measures of central tendency also have to be numbers in the set of data.

C.
Brook says this is sometimes true because the mean and mode may or may not be in the set of data, but the median is always in the set of data.

D.
Harry says this is sometimes true because the mean and median may or may not be in the set of data, but the mode is always in the set of data.

Answers

Answer:

B EMILY WOULD BE CORRECT

Step-by-step explanation:

/

can u plz help me in this plz?

Answers

There isn’t a picture what do you need help with

It cost Julie $2 for the materials to make a bracelet that she plans to sell. She sells each bracelet for $7. What is her percent increase in price (also known as percent mark up)?

Answers

Answer:

350% Increase

Step-by-step explanation:

If Julie creates a single bracelet for $2, then sells a single bracelet for $7, her profit increase would be 350%. Since $7 / $2 = 3.5, then 3.5 * 100 = 350%. Hope this helped!

The answer is their is a 350% increase.

If r = 8 units and x = 8 units, then what is the volume of the cylinder shown above?

A. 512 cubic units

B. 64 cubic units

C. 256 cubic units

D. 2,048 cubic units

Answers

I believe it is 512 cubic units.
A or b I’m not quite sure i think because it is. Cylinder it is b maybe because a cylinder has 2 flat sides but if it also talking about the not flat surfaces then it’s A

plzzzzz
hury uff hury

Answers

Answer:

with what there is no pictuer

Step-by-step explanation:

Answer:

Reflection

Step-by-step explanation:

Reflection is the image being mirrored.

Another example of reflection would be this...

What is the answer I need help I tried 49 time and I said it was wrong help

Answers

Answer:

1530

Step-by-step explanation:

I believe that is the answer

u just divide the 3rd column by 3 thats how I did it

hope this helped :)

ahhh i need so study this type of math but i suck at these help pls

Answers

Answer:

1482

Step-by-step explanation:

12x5=60

16x10=160

160+60=220

46x37=1702

1702-220=1482

WILL GIVE BRAINLIEST

Answers

Answer:

1

Step-by-step explanation:

i think

Answer:

y-intercept=1

Step-by-step explanation:

the y-intercept of a graph is the point where the graph crosses the y-axis.

now that we know what y-intercept is, we also know how to find it- and in your case, the y-intercept is 1 because that is where the line hits a 'perfect point' on the y-axis

good luck :)

i hope this helps

have a nice day !!

i need help with these please!

Answers

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Answer: C

Explanation: At the end they said how much did Victoria EAT, meaning that you have to do 6/7 x 1/4 to see the total amount of food that she ate.

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

The first question is the second answer where he walked. For a story, Mike used 2/6 of a tube of toothpaste he then used 3/4 of a tube of tooth paste how much toothpaste did he use in total?

I got 9 minutes left for this and its the last question. help

Answers

Answer:

B I think

Step-by-step explanation:

NEED HELP PLZ!!!!!!!!!

Answers

Answer:

y=25x-300

Step-by-step explanation:

We have to take the 300 out of the equation because that is getting taken away due to payment. She gains 25 per hour x being hours therefore being solved.

You spin a spinner (labeled 1 – 3) and rolls a standard number cube. What is the probability that you land on a 2 and roll a number greater than 2?

A) 1/9 B) 2/9 C) 2/3 D) 5/6 E) impossible

Answers

I believe the answer is C
The answer should be c
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