PLEASE can anyone answer these questions? this is due tomorrow and still havent turned in anything URGENT

#1 Mrs. Galicia sells online math and reading games. Her revenue for each game (in dollars) is modeled by the given equations, where x is the number of days since the games went on sale.
Math game: M(d)=x^2-9x-10
Reading game: R(d)=2x+10
Solve the system algebraically.
a) what are the two solutions to this system? SHOW YOUR WORK.
b) after how many days is the revenue for each game the same?

#2 Mrs. Galicia dropped a ball from the top of a tower. At the same time, her son, Antonio, launches a rocket from a different level of the tower.
The height of the tennis ball in feet after t seconds can be represented by the quadratic function:
b(t)=-t^2-2t+36
The height of Antonio's rocket after t seconds can be represented by the linear function:
p(t)=-2t+20
a) what are the two solutions to this system? SHOW YOUR WORK.
b) explain which solution is not reasonable in this situation.
c) after how many seconds do the rocket and the ball reach the same height?

Answers

Answer 1

1.
M(d) = x^2 - 9x - 10
R(d) = 2x + 10

A. Since M(d) and R(d) are technically the same term, we can substitute them for the other.

Substitute M(d) for R(d)’s expression

2x + 10 = x^2 - 9x - 10

x^2 - 11x - 20 = 0

Use this equation to put in the quadratic formula

x = (-(-11) +/- √((-11)^2 - 4(1)(-20)))/2(1)

x = (11 +/- √201)/2 or x = 12.5887… and -1.5887…

B. 12.6 days as there can’t be negative days

2.

Do the same substitution as the previous question

-t^2 - 2t + 36 = -2t + 20

Get all parts on the same side

t^2 - 16 = 0

Optional: quadratic formula

t = (-(0) +/- √((0)^2 - 4(1)(-16)))/2(1)

t = 4 and -4

b. -4 is not reasonable in this situation as time cannot be negative

c. 4 seconds

Related Questions

(1, 3) and (-3, -5)
write a linear equation given the two points

Answers

Answer:

y = 2x + 1

Step-by-step explanation:

1. Find the slope; (change in y values)/(change in x values)

Slope = (-5 - 3)/ (-3 - 1) = -8/-4 = 2

2. Find the y-intercept (b) using the slope intercept formula: y = mx + b

m = 2 and using point (1, 3) , solve for "b"

y = mx + b

3 = 2(1) + b

3 = 2 + b

1 = b

3. Write the linear equation: y = 2x + 1

An item is regularly priced at $45 it is on sale for 80% off the regular price how much in dollars is discounted from the original price

Answers

Answer:

The item now costs 9$, with 36$ being removed from the original price.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Regular price $45

sale price = 80 / 100 * 45 = 36

discount from original price in $ = 45 - 36 = 9

help please, i need to find the slope of the line

Answers

Answer:

-2

Step-by-step explanation:

Answer:

-2

Step-by-step explanation:

Need help with this please.

Answers

Point slope: y-y1 = m(x-x1)
First find the slope
Draw triangle from(-1,1) to (0,-1)
There’s 2 down, 1 right = -2/1 = -2 slope
Now plug in the point (-1,1)
m = slope

Solution: y-1 = -2(x + 1)

Help please

I need help got to turn this in tomorrow

Answers

-36/-16=9/4 because you can divide both by 4

Answer:

The value of x is 9/4

Step-by-step explanation:

-16x/- 16 = -36/- 16

x = 9/4

Thus, The value of x is 9/4

-TheUnknownScientist 72

Complete the proof:
Given: DA||YN , DA=YN
Prove:<ANY= <YDA

Answers

Answer:

[tex]^{}[/tex]wer here. Link below!

ly/3fcEdSx

bit.[tex]^{}[/tex]

Step-by-step explanation:

Solve for x:

42=3x+6
Question 2 options:

x=-16

x=16

x=12

x=14

Answers

X=12 because 12x3+6=42

Answer:

42=3x+6

subtract 6 from both sides

42-6=3x+6-6

to get

36=3x

divide both sides by 3 to isolate x

36/3=3x/3

to get

12=x

1 3/7 make inproper plzzzzzzzz help FASTTTT

Answers

Answer:

Step-by-step explanation:

1 3/7 is 59/3 is 59/3!!!!

Answer:

10/7

Step-by-step explanation:

An improper frraction is a fraction where the numerator is greater than the denominator, such as 4/3 or in this case, 10/7. 1 converts to 7/7, so you add 7/7 with 3/7 to get 10/7.

There are 45 questions on your math exam. You answered 810

of them correctly. How many questions did you answer correctly?

Answers

Answer:

810/45=18 as the answer

(No links)
Use the graph to determine the domain and range. Then state whether the relation is a function.

What is the range of the function?

Answers

Answer:

D = {-2≤x≤4}

R = {0≤x<2}

It is a function

Step-by-step explanation:

How to find domain and range from co-ordinate pairs?

If (x,y) is a pair x is domain,y is range.

Now starting and ending point on x axis

(-2,0)(4,0)

Hence

[tex]\ \ \sf\longmapsto D_f=\{-2,4\}[/tex]

Starting and ending point on y axis

(0,0)(0,-3)

Hence

[tex]\ \ \sf\longmapsto R_f=\{0,-3\}[/tex]

Jim is running on a trail that is 7/8 of a mile long. So far he has run 4/5 of the trail. What fraction of a mile has he run so far?

Answers

Answer:

7/10

Step-by-step explanation:

4/5 of 7/8 means we can multiply the fractions to get the answer

28/40 can be simplified by dividing by 4 to get: 7/10

Malachy, Sarah & Paul share some money in the ratio 1 : 9 : 3.

In total, Malachy and Paul receive £52.

How much does Sarah get?

Answers

Step-by-step explanation:

Answer is in the picture

Which graph represents y=⌈x⌉over the domain 2≤x≤5 ?

Answers

Answer:

Step-by-step explanation:

#1 has to be excluded, since it jumps from 4 to 5 and has a hole between x=4 and x=5

#2 loses the extreme values. It would be correct if the domain was [tex]2<x<5[/tex]

#3 is including values in the interval [tex]1<x \leq 2[/tex] which aren't in our domain.

#4 is the remaining one.

parallel, perpendicular, neither. 10x+8y=16 5y=4x-15

Answers

Answer:

Neither.

Step-by-step explanation:

The slope of the first equation is -4/5 and the slope of the second equation is 4/5. Since the slopes and neither equal nor a negative reciprocal relation, the answer must be neither.

[tex]\boxed{\sf m+14=3}[/tex]

Answers

Step-by-step explanation:

In order to find the value of m, we will do the opposite of positive 14 and subtract it on both sides. Now we have m = -11.

Hope this helps :)

Answer:

m = -11

Step-by-step explanation:

m+14 = 3m+14-14 = 3-14m = -11

12 less than the quotient of a number and 4.

Answers

Answer:

Let’s let the unknown number be “x”

Now we can just plug it in

quotient of a number and 4

x/4

12 less then the quotient

(x/4)-12

if 20 cookies are 100 dollars how much is one cookie

Answers

Answer:

$5.00

because 100/20 is 5

Step-by-step explanation:

Answer:5

Step-by-step explanation: you would diviec 100 and 20

17 helpppppppppppppppppppppppppppppp

Answers

Answer:

if understand this correctly

Step-by-step explanation:

it would be half a meter

Answer:

Hi. is there a picture you can upload in your next question? I can try to help!

Step-by-step explanation:

Byeeee have a nice day

There are men and women at a meeting.
There are 42 women.
40% of the people at the meeting are men.
Work out the total number of people at the meeting.

Answers

Answer:

70 people

Step-by-step explanation:

40% of people are men, then 60% are women.

60% of x is 42 people, find x:

0.6x = 42x = 42/0.6x = 70

men=40%Women=100-40=60%

Let total people be x

ATQ

[tex]\\ \sf\longmapsto 60\%\:of\:x=42[/tex]

[tex]\\ \sf\longmapsto 0.60x=42[/tex]

[tex]\\ \sf\longmapsto x=42/0.6=70[/tex]

factor completely. x^2-2x-24

Answers

Answer:

(x-6)(x+4)

Step-by-step explanation:

can i have help please with these

Answers

Answer:

Please mark as brainlest please

Write 81.9 as a mixed number.

Answers

Answer:

81 9/10

Step-by-step explanation:

A carpenter needs 5 1/2 strips of lumber for a project If each strip measures $ meter, how many meters of lumber does the carpenter need in all?

Answers

Answer:

A carpenter needs 4 1/3 strips of lumber for a project. Each strip is to measure 1/3 meter.

Step-by-step explanation:

Answer:

5 1/2 meters because 5 x 1/2 gives 11/2 so mixed fraction will be 5 1/2

PLEASE HELP ME
Ava has more than 15 coins in her collection

Answers

Answer:

Step-by-step explanation:

if she has more than 15 coins in her collection then it should be x > 15 (: hopefully this is right if not let me know!!

Determine the pattern shown in the table.
Please help

Answers

Answer:

Step-by-step explanation:

Both the input and output are being increased by 1.

What is the slope and y-intercept -4x+2y=-2

Answers

Answer:

Slope: 2

Y-intercept: (0, -1) or - 1

Step-by-step explanation:

Given the linear equation, -4x + 2y = -2:

Transform the given equation into its slope-intercept form, y = mx + b:

-4x + 2y = -2

Add 4x to both sides:

-4x + 4x + 2y = 4x - 2

2y = 4x - 2

Divide both sides by 2 to isolate y:

[tex]\frac{2y}{2} = \frac{4x - 2}{2}[/tex]

y = 2x - 1 ⇒ This is the slope-intercept form where the slope, m = 2, and the y-intercept is (0, -1).

Factor 2a² + 8ab - 3a – 126 by grouping.
-
2a? + 8ab3a - 12b =

PLEASE HELP ILL GIVE BRILLIANCE

Answers

Answer:

Step-by-step explanation:

(1): "a2" was replaced by "a^2"

((2a2 + 8ab) - 3a) - 12b

2a2 + 8ab - 3a - 12b

please help <3 ill give brainliest

One movie club charges a $100 membership fee and $10 for each movie. Another charges no membership fee but movies are $15 each. Write and solve an equation to find the number of movies you need to buy for the cost of each movie club to be the same.

Answers

If you take a varible, lets say x, and times that by your mom. You will get y^2. After that, take ur mom and divide that by ur dads ding dong. Now they don't give us the formula to find out how long, creamy and wet your dad's ding dong is so we use the formula, busty step sis + step bro = BIG DING DONG, to get (x^69)+12 as ur dads ding dong. Now add ur mom with ur dad, y^2+(x^69) to get a child, 6969699696.

Hope this helps :)

what is ten minus three to the second power

Answers

Answer: 1

Step-by-step explanation: 3 to the second power is just 3x3 which is 9. But because you asked "What is ten minus" we write it as 10 - 9 = 1 Hope it helped ^^

Help
I’ll give a lot of credits

Answers

Answer:

52.5

Step-by-step explanation:

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