Mathematics College

Please look at the picture. I answered b but it was incorrect.
Please help.

Please Look At The Picture. I Answered B But It Was Incorrect. Please Help.

Answers

Answer 1

9514 1404 393

Answer:

  d.  14 -3x

Step-by-step explanation:

If you want to substitute for y in the second equation, you must use the first equation to find an expression for y.

  3x +y = 14 . . . . . . first equation

  y = 14 -3x . . . . . .  subtract 3x from both sides

This gives you the expression for y that you want to use for substitution. It matches the expression of choice D.

  y = 14 -3x . . . . matches D

Related Questions

Help... Its like 10 p.m and i gotta get dis done...

Answers

Answer:

C

Step-by-step explanation: A would not make sense because 19 x 10 is 190 and 19 x 20 is 380. B would not make sense because 19 x 22 is 418 and 19 x 40 is 760. D would not make sense because 19 x 220 is 4180 which is above what you are looking for. Therefore, the only option left is C.

What are the zeros of f(x) = x^2 - x- 12? Please explain if you can.

Answers

Answer:

4 and -3

Step-by-step explanation:

So our function is f(x) = x² - x -12

We need to find factors such that 0 = x² - x -12

So, it looks something like this 0 = (x - a)(x - b)

We know that the first term is x², which can only be obtained if we multiply x by another x.

Now, we need to find the other terms a and b. We know that a × b = -12

The correct answer would be that a = 4 and b = -3

0 = (x - 4)(x + 3)

We know this because, if we multiply this out, we get x² + 3x -4x -12, which can be simplified to x² -x -12.

Our zeroes are the values of x that this equation 0 = (x - 4)(x + 3) is true. What values of x will make this zero?

4 and -3

Pls help this is due in 10 minutes

Answers

Answer:

y = 52

Step-by-step explanation:

y/4 - 7 = 6 (get the y isolated)

y/4 = 13 (add 7 to both sides)

y = 52 (multiply 4 on both sides)

Construct 98% confidence intervals based on the following data: 49, 38, 67, 69, 58, 70, 66, 85.​

Answers

Answer:

May I have a little more context please?

Step-by-step explanation:

There is 0.94 of probability that the alarm in your phone works on any given morning. What is the probability that it will not work

Answers

0.06

my alarm never works tho lol


Type SSS, SAS, ASA, SAA, or HL to
justify why the two larger triangles are
congruent.
8 cm
8 cm

Answers

I think it’s HL I’m in acellus to what grade you in ?

In a triangle ABC if ∠A= 72° and ∠B= 63° find ∠C​

Answers

Answer:

Angle C = 45 degrees

Step-by-step explanation:

All interior angles of a triangle add up to 180 degrees.

180-72-63 = angle C

Angle C = 45 degrees

The person above is right

Three students ran 1/2 mile around a track. The table below list the time each student took to run around the track. Complete the table by calculating the average speed of each student in miles per hour (mph).

Give answer and explanation of how you got the answer please. Give brainlyest. ​

Answers

Answer:

Step-by-step explanation:

Answer:

Ava 6 mph; Damon 10 mph; Reina 7.5 mph

Step-by-step explanation:

Gabriel age is two times Mikahils age. The sum of their ages is 81. What is Mikahils age

Answers

I’m not sure but it has to be half Gabriel’s age

Step-by-step explanation:

Gabriel age is 54 and Mikahils age is 27

I found the answer by using the trial and error method

Can someone please help with these two questions please?

1. Assume that the radius r of a sphere is expanding at a rate of 60 cm/min. The volume of a sphere is V = 4/3r^3 and its surface area is 4r^2. Determine the rate of change in surface area at t = 2 min, assuming that r = 16 at t = 0.

2. A conical tank has height 3 m and radius 2 m at the top. Water level is rising at a rate of 2.1 m/min when it is 1.8 m from the bottom of the tank. At what rate is water flowing in? (Round your answer to three decimal places.)

Answers

Answer:

Step-by-step explanation:

S=4πr²

ds/dt=4π×2r×dr/dt=8πr dr/dt

dr/dt=60 cm/min

ds/dt=8π×60r=480πr

r=16,t=0

at t=2,r=16+32=48 cm

so ds/dt=480π×48=23040 πcm²≈72382.79 cm²

2.

[tex]V=\frac{1}{3} \pi r^2*h\\\frac{r}{h} =\frac{2}{3} \\r=\frac{2}{3} h\\V=\frac{1}{3} \pi( \frac{2}{3} *h)^2h\\V=\frac{4}{27} \pi h^3\\\frac{dV}{dt} =\frac{4}{27}\pi *3h^2\frac{dh}{dt} \\\\when ~h=1.8 ~m,\frac{dh}{dt} =2.1~m/min\\\frac{dV}{dt} =\frac{4}{9}\pi h^2\frac{dh}{dt} =\frac{4}{9} \pi*(1.8)^2*2.1=27.216 \pi \approx 85.502 m^3[/tex]

Use the grouping method to factor the polynomial below completely.
3x3 + 6x2 + 5x + 10
A. (3x2 +5)(x+2)
B. (3x2 + 5)(x + 5)
C. (3x2 + 2)(x + 5)
D. (3x2 + 2)(x + 2)

Answers

Answer:

its A

Step-by-step explanation:

i did the test

A 40% discount is the same as paying:
1.
60% of the original price
2
2.
of the original price
5
3.
140% of the original price
4.
40% of the original price

Answers

Answer:

Step-by-step explanation:

60% of original price

60%of the original price

z + y2
for y = 6 and z = 1

Answers

Answer:

37

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Step-by-step explanation:

Step 1: Define

z + y²

y = 6

z = 1

Step 2: Evaluate

Substitute in variables:                                                                                     1 + 6²Evaluate exponents:                                                                                         1 + 36Add:                                                                                                                   37

I need help with before 9

Answers

Answer:

There is no 9 on the paper.

Step-by-step explanation:

Answer:

1) p = how much he was paid per lawn

2) 4p = how much he was paid for 4 lawns

3) 4p = 24, then p = $6

4) 45-d = 21,  d = $24

- Kirk is reading a book and found that after 5 days he had read 180 pages.
rate is Kirk reading the book in (b) If the book is 765 pages long, how many
days will it take him to read the book at
the rate you found in (a)?

Answers

Answer:

21.25 days

Step-by-step explanation:

We first need to find the rate that he read the book for the first 5 days:

180 (pages)/5 (days)= 36

So he reads 36 pages a day. Now we need to find how many days it will take him to read the whole book, while reading 36 pages a day.

765 (total pages)/36 (pages he reads in a day) = 21.25

Have a wonderful day, my friend.

there are 84 girls in grade 3.the boys are twice the numbers of girls. how many pupils are there in all in grade 3?​

Answers

Answer:

252

Step-by-step explanation:

Girls = 84

Boys = 84 * 2 = 168

Total = 252

Answer:

Step-by-step explanation:

no of girls in grade 3 = 84

by the question no of boys are twice the number of girls so

no of boys = 2 * 84 = 168

Total no of pupil in grade 3

= 168 + 84

= 252

hope it will help :)

The carnival is in town for 21 days. How many weeks is the carnival in town?(There are 7 days in 1 week.) Write and equation,and solve.​

Answers

Answer:

egn= 7x=y

where x= weeks no.

y= days

atq...x= 3

Please help it’s just one question!!

Answers

a. m

5=157=218=2410=30

hope it helps.

please answer quick brain list on cludded ​

Answers

Answer:

(-3,-4)

Step-by-step explanation:

Alistair is in the business of making office products for schools and colleges. Alistair realizes that there are many other firms manufacturing similar products. Why does Alistair require risk management?
A.
to cover his risk of product liability
B.
to cover the risk of stiff competition
C.
to cover expenses of raw material
D.
to cover expenses incurred to maintain their ethical standard


CORRECT ANSWER- to cover the risk of stiff competition

Answers

Answer:

Its B--- to cover the risk of stiff competition

Your are welcome

Step-by-step explanation:

solve the equation x- 4/5 = 7/10

Answers

Answer:

x=1 1/2

Step-by-step explanation:

4/5=8/10

x-8/10=7/10

x=15/10

x=1 5/10

x=1 1/2

Help&EXPLAIN

Don’t use for points or will be reported and I’ll take the points back

Answers

Answer:

i guess the answer maybe A

-2xSquared +4x-1 minus 6x squared+3x-9

Answers

Your answer is 4x^2+7x-10

Please help- Show ur work,, and please answer correctly
I will also give brainliest

Answers

Answer:

x = -4.

n = -2.

v = -5.

Step-by-step explanation:

18 = -4x + 2

18 - 2 = -4x

x = 16/-4

x = -4.

6 + 2n = 2

2n = 2 - 6 = -4

n = -2.

5v + 8 = -17

5v = -17 - 8

5v = -25

v = -5.

I need help the question is solve the equation n+75=155​

Answers

all you need to do for this is 155-75 which would be 80 :) hope this helps

Answer:

80

Step-by-step explanation:

155-75=80

A frame is 4 inches tall and 3 inches wide if it is enlarged to a height of 24 inches then how wide will it be

Answers

Height: width
4:3 = 24:x
x = 18
The frame will be 18 inches wide.

P=15,000, r=8%, t=30 days. Find the simple interes owed for the use of the money. Assume 360 days

Answers

Answer:

Step-by-step explanation:

$15,000×0.08 = $1,200 interest for 360 days

$1,200 × 30/360 = $100 interest

An online flower service sells boxes of roses. Each box contains one dozen roses of only one color. The choices are red, white, or pink. Based on the last 1000 orders, about how many boxes out of the next 100 orders will be for white or pink roses?

Answers

Answer:

The answer is 21

Hope it helps

Please mark me as the brainliest

Thank you

(x²+4+3x+2)+(3x²ty)
Pls help

Answers

Answer:

(x²+ 5 + 3x + 2)+ (3x²ty)

(x² +6 +3x) + ( 3tx²y)

x² +6+3x +3tx²y

Answer:

[tex]sln \\ (x {}^{2} + 4 + 3x + 2) + (3x ^{2} ty) \\ x {}^{2} + 6 + 3x {}^{2} t y \\ 3x {}^{2} ty + x {}^{2} + 6[/tex]

If you need 2 liters of soda for every 12 students at the school dance, and you sold 360 student tickets to the dance. About how many liters of soda should you buy so that you have enough for all 360 students at the dance.

Explain the answer please
PLEASE HELP I WILL GIVE BRAINLIEST!!
(the name of the video to help is "Math Antics - Proportions"

Answers

Answer:

60 liters

Step-by-step explanation:

360/12=30

30x2=60 liters

Hope this helps! :)

60 because 2 for 12 so u wil need 6 for 36 and then x10 which is 60
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