Mathematics High School

A bicyclist is riding at a speed of 18 mi/h when she starts down a long hill. The distance d she travels in feet can be modeled by d(t) = 41^2 + 18t, where t is the time
in seconds. How long will it take her to reach the bottom of a 400-foot-long hill?

Answers

Answer 1

Answer:

8 seconds

Step-by-step explanation:

d(t)=400

4t^2+18t=400

4t^2+18t-400=0          subtract 400 from both sides

2t^2+9t-200=0           divide by 2 on both sides

x=8; -25/2                     solve using quadratic formula

Related Questions

HELP I WILL GIVE BRAINLIEST
What steps would you follow to graph the inequality statement?

-4 < -w

place an open circle on 4 and shade to the left
place a closed circle on 4 and shade to the right
place an open circle on -4 and shade to the left
place a closed circle on -4 and shade to the right

Answers

Answer: D

Step-by-step explanation:

-4 < -w

w > -4

Since it doesn't have an equal sign, its an open circle. Since its greater than -4, it is going to the right, so shade right.

Answer is D

PLEASE ANSWER !!!!!!!!!!!

Answers

Answer:

1 1/16

explanation:

its 1/16 of a pound because its half a serving and a serving is 1/8 of a pound

Which unit is bigger?
millimeter

centimeter

meter

kilometer

Answers

Answer:

The answer is kilogram

Step-by-step explanation:

The answer is a kilogram because a kilogram is 1,000 times larger than one gram (so 1 kilogram = 1,000 grams). A centimeter is 100 times smaller than one meter (so 1 meter = 100 centimeters). A dekaliter is 10 times larger than one liter (so 1 dekaliter = 10 liters).

Hope this helps!!

I need help solving 10 ! Please

Answers

8/-1=-1/-1

=-8

the answer is -8

can someone explain

Answers

Answer:

K = -2

Step-by-step explanation:

K represents the y-intercept, which is where the line crosses the y axis. We can see from the y = -4x -2, that -2 is the y-intercept, because in y =  mx + b, b is the y -intercept.

~theLocoCoco

if there are 250 fish in the lake and 50 more are added each year, write a linear equation

Answers

linear equation: y = 50x + 250

+
Write the polynomial "5a2+3a²+a+1” in standard form (from greatest power to
lowest):

Answers

Answer:

8a2+a+ 1

Step-by-step explanation:

just so I know the 5a2 is 5a square r?

The coordinates G(7, 3), H(9, 0), I(5, -1) form what type of polygon?

an obtuse triangle
an acute triangle
an equilateral triangle
a right triangle

Answers

Answer:

C is the answer

Step-by-step explanation:

Answer:

an equilateral triangle

Step-by-step explanation:

A 24 oz. bottle of pop costs $2.25. What is the price per ounce? How did you get that answer?

Answers

the answer is 10cents i think.. i used decision

Answer:10.07

Step-by-step explanation: I got my answer by dividing 24 and 2.25. First, I set up my equation, 24 / 2.25. Then, i multiply 2.25 by 10, which was 22.5. Then i subtracted, which was 1.5 then i bring down my 0. 2.25 doesnt go into 1.50 so I add a 0. then i bring down a 0.

need answers to this for slope, y-intercept, and x-intercept

Answers

Answer:

slope = -2/3

Step-by-step explanation:

rise over run

Answer:

y-intercept: (2,0)

x-intercept: (0,3)

slope: -2/3

Step-by-step explanation:

Helppppppp i have no idea never learned this i will give big brain ​

Answers

Answer:

i dunno about other people but the formula I learned needs the question to give you the radius.  

Step-by-step explanation:

ACP=(mAB/360)(2 pi r)

=(74/360)(6.28 r)

=1.29r

Answer:ACP=(mAB/360)(2 pi r)

=(74/360)(6.28 r)

=1.29r

Step-by-step explanation:

If f(x)=-x^2– 7x – 22, find f(-5).

A. -82
B. -32
C. -12
D. 12
E. 38

Answers

Answer:

E. 38

Step-by-step explanation:

f(-5) means to plug in -5 for x in the given equation

[tex]f(-5)=(-5)^2-7(-5)-22=25+35-22=38[/tex]

what is the common factors of 5 and 6


Please do not google it

Answers

9514 1404 393

Answer:

  1

Step-by-step explanation:

The only integer factor common to 5 and 6 is 1.

__

This will be true for any pair of natural numbers that differ by 1.

Solve for a.

4(a + 3)=12 + 4a



−1

no solution

all real numbers

−3

Answers

Final Answer: All Real Numbers

Steps/Reasons/Explanation:

Question: Solve for a. [tex]4(a + 3)=12 + 4a[/tex].

Step 1: Expand.

[tex]4a + 12 = 12 + 4a[/tex]

Step 2: Cancel [tex]4a[/tex] on both sides.

[tex]12 = 12[/tex]

Step 3: Since both sides equal, we would have infinitely many solutions.

~I hope I helped you :)~

Answer:1

Step-by-step explanation:1

HELP I WILL MARK BRAINLIESTTT!!!

Answers

Answer:

D

Step-by-step explanation:

I know this stuff

A college textbook costs $90,00. If the sales tax rate is 6.5%, then how much will the tax be?

Answers

Answer:

The sales tax is 6.5% of the selling price of the book: 0.065($90.00) = $5.85.

Step-by-step explanation:

16. Write an equation for the translation of y = |x|that is 3 units up. *​

Answers

Answer:

y = |-3|

Step-by-step explanation:

TRUST ME

what number is the same as -1882384?

Answers

Answer:

-1,882384 x 10^6 or -1372^2

Step-by-step explanation:

Both forms equal -1882384.

It took Sharon 1 hour and 45 minutes to pick 3 1/2 pounds of raspberries. At what unit rate did Sharon pick raspberries?

A. 1/2 pound per hour
B. 1 3/4 pounds per hour
C. 2 pounds per hour
D. 2 1/4 pounds per hour
​

Answers

Answer:2 pounds per hour

Step-by-step explanation:

I just did it

Answer:

2 pounds per hour

Step-by-step explanation:

What is the domain of F? Will mark brainiest

Answers

Answer:

A

Step-by-step explanation:

the dots are at -5 an 6.

the dots are closed meaning that they are equal to. -5 is less than 6 and 6 is greater than -5. so the answer should be A

The domain of F is 6

a company dyes two sizes of rugs a small rug requires 8 hours for dyeing and a medium-sized rug requires 12 hours of dyeing the dryers have to make at least 22 guys ansld that must do it in less than 240 hours let x equal small rugs abd u equal medium rugs state a possible ordered pair solution for the system of inequalities justify mathematically using both inequalities​

Answers

Answer:

C says 8x+12y, but D says 12x+8y, instead of 8x and 12y. The correct answer is C, I guess

Step-by-step explanation:

Let x=small rugs and y=medium rugs. It takes 8 hours to dye a small rug, so you would write 8x. It takes 12 hours to dye a small rug, so you would write 12y. Those two would need to be added together. The dyer needs to dye at least 22 rugs in 240 hours, so you would need a less than or = to sign.

I'm not sure which choice has the line beneath, indicating that the sign is a "less than or equal to" sign, but the answer is gonna be either C or D.

8x+12y≤240, or 12y+8x≤240

What is true about the slope of two equations that have no solution?

Answers

Answer:

slopes are equal

Step-by-step explanation:

If the 2 equations have no solution then the lines are parallel and never intersect.

Parallel lines have equal slopes.

Answer:

according to our rules ,we can find the formula for the slope by talking the first derivative

is this set of ordered pairs of a function?
(1,1) (2,3) (3,4) (4,2) (5,1)

Answers

Yes it is a function

A picture frame can hold a photograph that is 16 inches long and 12 inches wide.
What is the area of the photo that fits the frame?
56 square
1) 162 square
) 192 square
28 square
inches
inches
inches
inches

Answers

12 x 16 = 192 square inches

[x]/[6]=-46 , what is x

Answers

Answer:

Step-by-step explanation:

x/6 = - 46

Multiply by 6 on both sides

x = - 46 x 6

x = - 276

Answer:

x= -276

Step-by-step explanation:

x/6=-46

x= -46(6)

x= -276

i think... :)

6th grade math i mark as brainliest​

Answers

Answer:

9. 30/6

10. 7.6 and u

Step-by-step explanation:

Which expression is equivalent to 2.72 + (−5.9) can anyone help

Answers

Step-by-step explanation:

-5.9-2.72

=-2.88

it a write answer

Help
award: Brainliest

Answers

Answer:3.51

Step-by-step explanation:


I just need one and two

Answers

Answer:

b. is not a function

and for question 2 the answer is a.

Step-by-step explanation:

1. B is the answer because one of the inputs has more than one output

2. When you solve it and connect the dots it forms that kind of curve.

3. Which is an estimate of the square root of 15 to the nearest tent
3.9
1.5
3.8
4.1​

Answers

Answer:

1.5

Step-by-step explanation:

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