Esteban has a big jar of change in his room. He has 600 coins total, and 240 of them are pennies. What percentage of the coins are pennies?

Answers

Answer 1

Answer:

Answer:

600 coins=40%

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the accountant charged $35 for the first hour of work and $23 for each hour he did after that he earned a totL or $127 how many hours did he work

Answers

He worked 5 hours in total: 35$ for the first hour, + 23 + 23 + 23 + 23 = 127$ for five hours of work.

The amount charged by the account in the first hour = $35
The amount charged by the accountant after first hour = $23
Total earnings of the accountant = $127
Let us assume that he worked for = x hours
then
35 + 23x = 127
23x = 127 - 35
23x = 92
x = 4
So from the above deduction we can conclude that the accountant worked for 4 hours. I hope the procedure is simple enough for you to understand.

One positive number is 5 less than twice a second number, and their product is 117. Find the two numbers.

Answers

x,y - the numbers

one positive number is 5 less than twice a second number

(1) x - 5 = 2y

their product is 117

(2) xy = 117

(1) x - 5 = 2y add 5 to both sides

x = 2y + 5 substitute it to (2)

(2y + 5)y = 117 use distributive property

(2y)(y) + (5)(y) = 117

2y² + 5y = 117 subtract 117 from both sides

2y² + 5y - 117 = 0

2y² + 18y - 13y - 117 = 0

2y(y + 9) - 13(y + 9) = 0

(y + 9)(2y - 13) = 0 ↔ y + 9 = 0 ∨ 2y - 13 = 0

y + 9 = 0 subtract 9 from both sides

y = -9

2y - 13 = 0 add 13 to both sides

2y = 13 divide both sides by 2

y = 6.5

substitute the values of y to (1)

x = 2(-9) + 5 = -18 + 5 = -13 < 0

x = 2(6.5) + 5 = 13 + 5 = 18

Answer: x = 18 and y = 6.5

Which equation represents the graph of the linear function?A.
y = 4x + 4

B.
y = 4x − 4

C.
y = −4x + 4

D.
y = −4x − 4

Answers

By looking at the graph you can rule out choices C and D because the graph given to you is an increasing linear function and C and D represent functions with a decreasing or negative slope.

By looking at the picture the slop of the graph seems to be 4/1 (rise/run) so your slope is 4. And your y-intercept looks like its -4 so your answer is B

Zuri made 2 spheres using plaster. The smaller sphere has a radius of 6cm. The larger sphere has a radius of 24cm. Hiw much greater a volume of plaster did Zuri use for the larger sphere? Use 3.14 to approximate pi. Round to the nearest hundredth if necessary. __cm^3

Answers

She used 56972.16 cm^3 plaster :)

12 is what percent of 4,000

Answers

Answer=0.3%

12 x
____=____
4000 100

cross multiply
4000x=1200
divide both sides by 4000
x=0.3
Answer= 0.3%

Answer is 4000*12/1000
or simply 4000*0.12 = 480

Does the equation represent a linear or nonlinear function explain 2x+3y=7

Answers

linear, because there is still a slope function (-2/3)

The equation is linear because you can rewrite it in slope-intercept form.

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A number minus one is at the most nine, or two times the number is at least twenty-four.