Mathematics High School

When 21 is subtracted from the square of a number, the result is 4 times the number.
Find the positive solution.

Answers

Answer 1

Answer:

7

Step-by-step explanation:

7^2 =49

49 -21 =28

28÷7 = 4

Related Questions

Sandy worked extremely hard at her job and earned a large bonus at the end of the year. She decided to give her children 2/5 of the money and her grandchildren 1/4 of her bonus. How much of her bonus did she keep for herself?

Answers

Answer:

7/20 of her bonus

Step-by-step explanation:

Solution:

She gives her children 2/5 of her bonus and grandchildren 1/4 of her bonus.

= 1 - 2/5 - 1/4

= 1 - 8/20 - 5/20

= 1 -13/20

= 7/20

I hope it helps.

When air is pumped into an automobile
tire, the pressure is inversely proportional to
the volume. If the pressure is 35 pounds
when the volume is 120 cubic inches, what
is the pressure when the volume is 140
cubic inches?

Answers

Answer:

I think it is 68.5714285714 cubic inches

Step-by-step explanation:

(x + 3) is a factor of the polynomial x^3 + 2x^2 - 5x + n.
What is the value of n?

Answers

Answer:

n = - 6

Step-by-step explanation:

Given (x + h) is a factor of a polynomial f(x) then f(- h) = 0

Here

f(x) = x³ + 2x² - 5x + n and (x + 3) is a factor then f(- 3) = 0 , that is

f(- 3) = (- 3)³ + 2(- 3)² - 5(- 3) + n = 0 , so

- 27 + 2(9) + 15 + n = 0

- 27 + 18 + 15 + n = 0

6 + n = 0 ( subtract 6 from both sides )

n = - 6

     

what is the vertex and axis of symmetry for the function f(x)=2(x+5)^2 -4

Answers

The vertex is (-5, -4) and the axis of symmetry is x = -5

Michaela and Aleah play on the same basketball team. In one game Michaela scored one fifth of the team's points and aleah scored one tenth's of the team's points. Together the scored a total of 42 points. How many points did the team score?

Answers

Together they scored 3/10 of the teams total points (since 1/5 = 2/10). Knowing this you can find what 1/10 of the total points scored was by dividing 42 by 3. That gives you 14, now that you know what 1/10 of the points scored was you can find the total points by completing the fraction and multiplying 14 by 10. This gives a total of 140 points scored by the team

A laptop computer is purchased for 3100. Each year, its value is 75% of its value the year before. After how many years will the laptop computer be worth $600 or less

Answers

Answer:7 to 9? Years

Step-by-step explanation: I’m not sure but if you got a couple trys try to do it.

Answer:

6 years

Step-by-step explanation:

Y = IA (r)^t

600 = 3100 (.75)^t

then just solve for T i recommend using guess and check, but thats me

and youll get 6 years.

Help plzz

Tap the word that "they" refers to.

Answers

Answer:Frogs

I think so…If it’s wrong and you can tell me and I’ll try correct it

Hope its correct!

;)

Have a great day!

What is s - -32 = 383 what does s =

Answers

Step-by-step explanation:

i dont know

I need help with this! Please asap

Answers

Answer:

1:Not

2:Not

3:Not

4:Not

5:Viable

6:Viable

7:Viable

8:Viable

9:Viable

10:Not

Step-by-step explanation:

Suppose the graph of y = f(x) is translated left 2 units, and up 8 units, then stretched vertically by a
factor of 3.

The new graph will have equation y =

Answers

Answer: f(x)=3(x+4)+ 8

Step-by-step explanation:

Stretch vertically by a factor of 3:  y = 3x

 

Then, translate two units leftward:  y = 3(x+2)

 

Then, translate 8 units upward:  y = 3(x+4)+ 8

The functions
=
shown in the graph.
f(2)= - x + 2 and
g(x) = (1)* + 1 are
- x + 2 = (*)* + 1
Ex+2
;
-3 -2 -1
1 2 3
What are the solutions to
3
=
-1
-2
Select each correct answer.
0-1
ОО
1
02
3

Answers

Answer:

0 and 1

Step-by-step explanation:

f(x) = g(x) at the point the touch each other.

Here they touch each other when x = 0 (touching the y axis) and x = 1

John’s weekly salary is $428.25. His employer is changing the pay period to semimonthly. What will John’s semimonthly salary be to the nearest cent?

Answers

Answer:  $856.50

Step-by-step explanation:

Semimonthly means twice a month.

2*(428.25) = $856.50

evaluate the function h(x) = |-2x|-9 for the given values of x a) h(4)=. b) h(-5)=. c) h(0) =

Answers

Answer:

h(4) = -1 ;   h(-5) = 1        h(0) = -9

Step-by-step explanation:

a)    h(x) = |-2x| - 9       Substitute x = 4

       h(4) = | -2 · 4| - 9

       h(x) = | -8| - 9

       h(4) = 8 - 9

       h(4) = -1

b)  h(x) = |-2x| - 9            Substitute x = -5

    h(-5) = |-2 · -5| - 9

    h(-5) = |-10| - 9

     h(-5) = 10 - 9

      h(-5) = 1

c)   h(x) = |-2x| - 9             Substitute x = 0

     h(0) = |-2 · 0| - 9

     h(0) = |0| - 9

     h(0) = 0 - 9

      h(0) = -9

     


x pounds of candy valued at $3.50 per pound is mixed with y pounds of candy valued at $4.30 per pound to produce 10 pounds of a mixture selling for $4 per pound.
Find x and y, the number of pounds of each type.

PLEASE HELP!!!

Answers

Your answer would be 2$ per pound

An automatic doughnut machine can produce 1500 doughnuts in 9 hours.
How long would it take the machine to make 300 doughnuts?

Answers

Answer:

1 hr, 48 minutes

Step-by-step explanation:

you can create a proportion:

doughnuts/hours = doughnut/hours (h)

1500/9 = 300/h

cross-multiply to get:

1500h = 2700

h = 27/15

h = 1 12/15, which is 1 hr, 48 minutes because 12/15 = 48/60

Find the X- and Y-intercepts of the given equation: 3x + 5y = 15

Answers

Answer:

Using the slope-intercept form, the y-intercept is 3 Since the equation '3x + 5y = 15' is transformed to slope-intercept form 'y = (-3/5)x + 3' the slope is (-3/5).

the product of 32.7 and 0.9 is? ​

Answers

Answer:

pruduct means multiply so 32.7x0.9=29.43

Find the perimeter. Simplify your answer.

Answers

perimeter= 4p+5 + 10 + 8
p= 4p+23

Find the indicated probability.
The following table show the results of a clinical trial for an allergy drug.

Answers

I’m pretty sure the answer is c but not quite sure I’ve had this before

please help me there are 3 more questions please

Answers

Answer:

Question 1: C) <5

Question 2: B) 139

Step-by-step explanation:

Question 1: They are looking for an angle with the same degrees as angle 4. There are for angles that have that, 1,4,5,8. When looking for the answer there is only one answer that fits in with those numbers, and that is answer C) <5.

Question 2: They provide us with the first angle of 139 degrees. Angle N corresponds with the first angle. Therefore angle N must be the same as the first angle, equaling 139 degrees.

Lucy has ridden 45 miles of a bike course. The course is 60 miles long. What percentage of the course has Lucy ridden so far?

Answers

Answer:

a

Step-by-step explanation:

4d=12 solve for the variable

Answers

Answer; d=3
Let me know if you need an explanation!

Sale amount 1250.00 and 5% Sales tax
What is the total amount payed

Answers

If the sale amount is 1250.00 and the 5% sales tax the total amount payed is 250

2. What is the exchange rate? Show your work. 1 US dollar = ___________ euro
help pls :(

Answers

Answer:

.88 Euro

Step-by-step explanation:

One U.S. dollar is equivalent to .88 Euro. Have a nice day!

What does substitute mean logarithms.

Answers

Answer:

Substitution means putting numbers in place of letters to calculate the value of an expression.

Step-by-step explanation:

HELP ASAP 100 POINTS RIGHT ANSWER GETS BRAINLSIT

Solve for x.

14(x−12)=−235

Enter your answer as a mixed number in simplest form by filling in the boxes.
x =

Answers

X=-67/14 or x=-4 11/14

Answer:

Hell your answer for x is 4 11/14 ( that is what i got)

Step-by-step explanation: K12

pls solve Solve. 3/4(x−8) =−1/2
x=−26/3
x = 10
x=22/3

Answers

Answer:

i think its the 3rd option

Step-by-step explanation:

i'd'k what it is but you can read it over and over again

(p.s Brainleist?)

Answer:

x=22/3

Step-by-step explanation:

IM SO CONFUSED!!! I need help what is the difference between 1+0 and 1x1 HURRY DUE TODAY

Answers

Answer:

one is addition the other is multiplication, though, both the sum and product equal the same solution

Step-by-step explanation:

hope it helps

Answer:

The answer is 0

Step-by-step explanation:

1+0=1

1x1=1

1-1=0

solve pls brainliest

Answers

Answer:

C.

Step-by-step explanation:

It multiplies by 2

Hope I could help!

5^-15 rewritten using a positive exponent.

Answers

Answer: 1/5 to the power of 15

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