Mathematics High School

Evaluate7r -
3
when r=2.5 andq=12.
+6)
A. 3.5
B. 4.5
C. 5.5
D. 7.5

Answers

Answer 1

Answer:

14.5

Step-by-step explanation:

Related Questions

help with this !!! thanks

Answers

Answer:  Casey bought 4 1/2 pounds of apples

The equation is 0.88x - $1.50 = 2.46

x is the unknown number of pounds of apples.

0.88 is the cost per pound,  0.88x is the total cost of the apples before the discount .The discount is $1.50   $2.46 is the cost after the discount.

Part b Step-by-step explanation:

0.88x - $1.50 = 2.46 . Add $1.50 to both sides

0.88x - $1.50 + $1.50 = 2.46 + 1.50  

On left, 1.50-1.50=0 so "cancels'  on the right, add $2.46 + 1.50 = 3.96

0.88x = 3.96  is the cost before discount . Divide both sides by .88

.88x/.88 = 3.96/.88 .  .88/.88 = 1 so 1 'cancels'  leaving x.   3.96/.88 = 4.5

x = 4.5

part c

4.5 is 4 1/2, the (previously unknown) number of pounds of apples.

Casey bought 4 1/2 pounds of apples.

NEED HELP PLEASE IM BEGGING YOU !!!!!!!!!!!

Answers

Answer:

Yes

Step-by-step explanation:

1/4*16 is equal to 4, 4+7=11, 11=11, so 1/4 is a solution

PLEASEEEEEEEEEEEEEEEEEEEE HURRYYYYYYYYYYYYYYYYYYYYYYYYYYYY SOMEONEEEE

Answers

Answer: C = 30 - 3t

Step-by-step explanation: he starts with 30 therefore having 30 on day 0 and he eats 3 daily so day 1 would be 27 day 2 24 and so on


A. y = 1x+2!
or
B. y = 1x - 21

Answers

Answer:

B.y=|x-2|

Step-by-step explanation:

y is equal to the modulus of x-2 two because in the graph the the line cut at -2

i don't understand this i need help like helppp please ​

Answers

Answer:

[tex]x = 110 \\ (exterio \: angles \: of \: a \: traingle \: sum \: up \: to \: 360)[/tex]

Answer:

x = 110

Step-by-step explanation:

Assuming you require the value of x

The sum of the external angles of a triangle = 360°

The 3 angles shown are external angles.

Subtract the sum of the 2 given angles from 360 for x

x = 360 - (140 + 110) = 360 - 250 = 110

The perimeter of a rectangle is 64 inches. Find the value of x if the width is 22 inches and tenth is 2x inches.

Answers

Answer:

5

Step-by-step explanation:

Did you mean length instead of tenth? If so, 22*2=44, 64-44=20, 20/2=10. The length of the rectangle is 10 so to find the value of x, divide 10 by 2 so, 10/2=5, and x is equal to 5. : )

Find the zeros of the function algebraically.
f(x) = 16x4 − 49x2

Answers

Answer: Plz mark me brainlest

Step-by-step explanation:

Just Simply Use Identity:

 

  a^2 - b^2 = ( a+b) ( a-b)

   Then:

     ( 49X^4 - 36 X^2) = 0

       (7 X^2 + 6 X) ( 7X^2 - 6X) =0

       7X^2 + 6X = 0, then           X( 7X +6) =0    X=0,  7x +6 =0   X = -6/7

           7X^2 -6x =0                   X( 7x - 6) =0   X =0   7x -6 =0    X =6/7

Pull out a factor of x² from f(x) :

16x⁴ - 49x² = x² (16x² - 49)

Now write it as a difference of squares, then factorize:

16x⁴ - 49x² = x² ((4x)² - 7²)

16x⁴ - 49x² = x² (4x - 7) (4x + 7)

Set this equal to 0 and solve for x :

x² (4x - 7) (4x + 7) = 0

x² = 0   or   4x - 7 = 0   or   4x + 7 = 0

x = 0   or   x = 7/4   or   x = -7/4

help ill give hella points plz thx​

Answers

Answer:

Using the variables it gives us it is B=150m

Step-by-step explanation:

1.) $1800-$1350=$450

$1350 is the total balance after 3 months and $450 is the amount he has payed in those 3 months

2.) 450/3=150

You do 450/3 to find how much he is paying per month. If you want to check your work do 1800-1050=750 then do 750/5=150

So you put the numbers in B = Zachary's balance after m months and you get B=150m

Answer:

150m

Step-by-step explanation:

HELLPPPPPP -9(x +3) =27
-9x + (?) =27 WILL GET BRAINLYIST

Answers

Answer:

-27

Step-by-step explanation:

 Given expression:

                        -9(x + 3)  = 27

               

   Now use the open the bracket;

                       -9x - 27  = 27

           Given  -9x + (?)  = 27

   

Comparing the two equations shows that the question mark corresponds to the value -27;

  The solution is -27

-4x+-3=-2x+-2
what is X?

Answers

x= -1/2 !!!!!!!!!!!!!!!!!
X=-1/3!!!!!!!!!
!!!!!

1. Dei has $10 to spend on nail polish. With
tax each bottle costs $2.49. Can Dei buy 3
bottles of nail polish?

Answers

Answer:

Yes she can

Step-by-step explanation:

Answer:

yes it would be 7 dollars

60% of the students in Mr. Vick's class have computers at home. If 21 students in his class have computers at home, how many students are there in his class?

Answers

Answer:

There are 35 students in his class.

Step-by-step explanation:

1. Create a proportion: 60/100=21/x

2. Cross multiply, or not (I prefer to cross multiply). 60x=2100

3. Solve the equation: x=35.

Answer: There are 35 students in his class, 14 people going in school, 21 student online.

Determine the range from the set of ordered pairs

Answers

Answer:

2nd option

Step-by-step explanation:

range is all the outputs

32º+ 20 + 5x+ 4x - 1. Find x.

Answers

Answer:

32°+20+9x-1

collect like terms

32°+20-1+9x

32+18+9x

50=9x

divide both side by 9

5.6

1 significant figure

=6

a boat traveled 27 miles in 2 hours. at this rate, how many miles will the boat travel in 1/2 an hour

Answers

Answer: 9

Step-by-step explanation:

43 +62 +57 + m / 4 = 55

Answers

the answer is .. m= -428

NEED ANSWER ASAP PLEASE!

Answers

Answer:

X=3.5686 for the first problem

Step-by-step explanation:

Do you need help with all of them?

I will mark brainliest if you can help with these and show work plus 40 points

Answers

Answer:

Step-by-step explanation:

The sum of 4 plus 7 equals 44

Answers

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

First you have to translate it into an understandable equation like this...

[tex]4+7=44[/tex]

You don't have to solve it because it is obvious that 4 and 7 don't add up to 44.

Answer:

Step-by-step explanation:

4+7=44

11=44

11-44 is -33 i guess is what you are looking for?

A paper company needs to ship paper to a large printing business. The paper will be shipped in small boxes and large boxes. Each small box box of paper weighs 25 pounds and each large box of paper weighs 70 pounds. A total of 21 boxes of paper were shipped weighing 1110 pounds altogether. Write a system of equations that could be used to determine the number of small boxes shipped and the number of large boxes shipped. Define the variables that you use to write the system.

Answers

Answer:

25s+70l=1110

s+l=21

Byron’s workout starts with a
warmup at home, and then he runs
at 4 mi/h. After half an hour of
running, he is 2 miles from home.
What is an equation in point-slope form that represents Byron’s
distance from home, y, after
x hours?

Answers

Answer:

An equation in point-slope form that represents Byron’s  distance from home, y, after  x hours is y=4x+2

Step-by-step explanation:

Speed of Byron = 4 miles / hour

Distance traveled in x hours = [tex]Speed \times time[/tex]

Distance traveled in x hours = 4x

We are given that After half an hour of  running, he is 2 miles from home

So, Total distance = 4x+2

So, y = 4x+2

Hence an equation in point-slope form that represents Byron’s  distance from home, y, after  x hours is y=4x+2

what is 1 + 1 (just doing this for points)

Answers

Answer:

2

Step-by-step explanation:

1+1 = 2

What is the value of x?

Answers

Answer:

10

Step-by-step explanation:

5x - 17 = 3x + 3 (vertically opposite angles)

5x - 3x = 3 + 17

2x = 20

x = 20/2

x = 10

hope it helps you!

Can ahhhh make what yeywywywy

3. I opened a compound interest account with $300 at 2%. How much money will be in the
account at the end of 18 months?

Answers

Answer:

there will be 408$ at the end of 18 months

Step-by-step explanation:

2% of 300 is 6 and 6 x 18 = 108. 108 + 300 = 408

Yes I agree with the friend who said $408.

300 x 2% = 6
and 6 x 18 mos. = 108
300+108=408

The answer is $408


Matthew enjoys running and often runs at a steady pace to burn calories.
At this pace he can run 1,500 feet in 30 minutes.
*What is Matthew's unit rate?
*How far would Matthew run in 7 minutes?

Answers

Answer:

28

Step-by-step explanation:

What is the greatest 3/5 0.7

Answers

Answer: 0.7

Step-by-step explanation: 3/5 equals 0.6 which is less than 0.7, so 0.7 is the greater of the two.

the product of 120 and b is equal to 312
Write the sentence as an equation.

Answers

Answer:

120 · b = 312 or 120b = 312

Step-by-step explanation:

A number increased by 27 is 233. Find the number.

Answers

Answer:

206

Step-by-step explanation:

233 - 27 = 206

Could someone help????

Answers

Answer:

3 1/2 + 3 1/2 is 7

Step-by-step explanation:

Yes, so 3 1/2 + 3 1/2= 7 here you go buddy!

Which of the following scenarios does not have a unit rate of 8?
O Joey rides his bike at a constant rate for 4 hours, x, and travels a total distance of 32 miles.
Jaclynn buys 3 pairs of socks, X, and spends a total of $24.
O Josephine buys 0.5 pounds of grapes, x, for $4.00.
O Jerry ran at a constant rate for 8 minutes, x, and traveled 2 miles.

Answers

Answer:

Jerry's Running

Step-by-step explanation:

Joey's biking:

32/4=8 Not this one.

Jaclynn's Shopping:

24/3=8 Not this one.

Josephine's Grapes:

4/0.5=8 not this one

Jerry's Running:

2/8= .25 This one is correct

Other Questions
Imagine that you are looking at two stars in the night sky. The second star appears brighter than the first star. Name at least two reasons from the passage that the second star might appear brighter. -please read this to help u ---> After the sun sets, take a look at the night sky. On a clear night, youll be able to see stars scattered across the black expanse that we call our universe. If youre lucky, you might be able to spot some stars that look bigger than othersthey shine brighter and attract our attention more than their smaller neighbors do. You might wonder: why are some stars brighter than others?After much observation, scientists discovered the way stars appear to us depends on more than their actual sizeits also about how far they are from us. Therefore, the farther a star is from Earth, the smaller it will appear to us. The closer it is, the bigger it will look.Try to think of the biggest star youve seen in the sky. An easy one, right? The sun! Thats because the sun is closest to us compared to all other stars, located at just a short 150 million kilometers from Earth.The next one? Thats a tougher question. Many people answer Alpha Centauri, but some dont know that its actually a cluster of three starsAlpha Centauri A, Alpha Centauri B, and Proxima Centauri. Proxima Centauri is 4.24 light-years away and closest to our sun. A light-year is the distance that light travels in one year. We use this measurement because light is the only thing in the universe that maintains a constant speed. However, even though Proxima Centauri is the closest star to the earth after the sun, you can only see it with a very powerful telescope. That doesnt make sensedidnt we just say that closer stars appear larger and more visible?Well, Proxima Centauri is what we call a red dwarf. Red dwarf stars are very small, typically having less than half the mass of the sun. That means they generate less energy than the sun. Most stars burn hydrogen for fuel. Similar to the way a car uses gas for power, a star uses hydrogen for energy. Red dwarfs burn hydrogen very slowly, which means they generate little light compared to stars like the sun.Proxima Centauri is the closest star after the sun, but that doesnt necessarily mean its what we consider close in our minds. To completely understand how far away this star is, lets think about traveling 4.24 light-years away. NASA has built one of the fastest spacecrafts in existence, called New Horizons, which travels at about 60,000 kilometers per hour. Even at this speed, it would take the spacecraft 78,000 years to reach Proxima Centauri from Earth.Sadly, the first few closest stars are not visible to the naked eye at night, which means we cant see them while were stargazing from our homes or backyards. The closest star we can see at night is called Sirius, or the Dog Star. While Proxima Centauri is only 4.24 light-years away, Sirius is 8.6 light-years away. However, since Sirius is so large (almost twice the size of the sun), we can see it in the night sky.So go outside and see what you can find up there! From who did Muhammad learn about Christianity? 5 - 2y + 1/3 + y^3 - 10y for y = 4I solved this equation but I'm not sure if I got the answer correct and if I messed up somewhere when I was solving it then I got my answer wrong. So if someone could please help me that would be very much appreciated!!!!! Settlements developed along the Nile River because __________.A.gold mines were discovered along the banks of the NileB.tribal warfare pushed people out of the Sahara DesertC.the Sahara region dried out after the last Ice AgeD.unseasonably cold weather forced people north from central Africa How are 18:3 and 6:1 equivalent ratios The human body ___________ (can/cannot) produce all the amino acids. The religion of the Hebrew people According to the law of superposition, where would you find objects with an older relative age? Please help me!!!!!!!!!!!!!!!!!!!!!! If you force the magnitude of the vector to stay the same, but increase the vertical component value, what happens to the horizontal component of the vector? The most massive planet in the solar system, Jupiter, has a mass of about 1,898,000,000,000,000,000,000,000,000 kg. The least massive planet is Mercury, which has a mass of about 330,000,000,000,000,000,000,000 kg. How many times more massive is Jupiter than Mercury? Answer the questions to find out. 1. Estimate Jupiter's mass using a one-digit whole number times a power of 10. Be sure to include units. Club foot is a rare disease due to congenital skeletal abnormalities, both genetic and nongenetic factors are thought to be responsible for club foot. A family in which club foot was inherited as an autosomal dominant trait with reduced penetrance was identified in 2008. It was found that a mutation in the PITXI gene that caused club foot in this family. Through DNA testing, they determined that 11 people in the family carried the PITXI mutation, but only 8 of these people had club foot.Required:What is the penetrance of the PIXTI mutation in this family? when water changes state from a liquid to a solid is energy absorbed or lost? Select the correct answer.How is the story's conflict resolved?A. Carl goes to sleep to block out his fears.B. Carl wakes up from his bad dream.C. The chaperone takes Carl and the other campers inside.D. The campers decide that the weather is dangerous and go home. A phrase must have a subject & predicate & express a complete thought. t/f ? Describe the factors that gave European countries an economic advantage in Asia from 1750 to 1900? f Chad drove 168 miles in 2 hours, how many hours will it take Chad to drive 840 miles traveling at the same rate? whose better Tamiki Suo or Kyoya Oturey from Orian high host club. PLEASE HELP NOW!!On the grid below, which point is located in the quadrant where the x-coordinate is a negative number and the y-coordinate is a positive number? 10. What was Thomas Paine's opinion about the colonies and Great Britain?A. The colonies should break from British rule.B. The colonies should continue to be taxed by Britain.C. The colonies should remain under British rule.D. The colonies should stop fighting the British.