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goblinko [34]
3 years ago
14

Question 3 (0.5 points)

Mathematics
1 answer:
nekit [7.7K]3 years ago
5 0

Answer:

0.72

Step-by-step explanation:

7.25+2.35=9.6

9.6÷100=0.096

0.096×7.5=0.72 the tax

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PLEASE HELP ME! Last question, and I'm stuck!
svetoff [14.1K]
The expression should be (2/h)x(k+8).
5 0
3 years ago
Find 2 positive real numbers that differ by 1 and have a product of 1
velikii [3]
A) x -y =1
B) x * y =1
B) y = 1/x

A) x -(1/x) = 1
Multiplying both sides by "x"
A) x^2 -1 = x
A) x^2 -x -1 = 0

Solving by the quadratic formula
x = 1.618 and
y = .618

Interestingly, the number 1.6180339... is called the "phi ratio" or the "golden ratio".
https://en.wikipedia.org/wiki/Golden_ratio




6 0
3 years ago
Sarah has a collection of nickels, dimes, and quarters worth $28.75. She has 10 more dimes than nickels and twice as many quarte
Ymorist [56]

Answer:

Step-by-step explanation:

Write an equation for each statement:

:

"Sarah has a collection of nickels, dimes, and quarters worth $15.75."

.05n + .1d + .25q = 15.75

:

"She has 10 more dimes than nickels"

d = n + 10

:

"twice as many quarters as dimes."

q = 2d

:

How many coins of each kind does she have?

:

Take the 2nd equation and arrange it so n is in terms of d also

n + 10 = d

n = (d - 10)

:

In the 1st equation substitute (d-10) for n and 2d for q:

.05n + .1d + .25q = 15.75

:

.05(d-10) + .1d + .25(2d) = 15.75

:

.05d - .5 + .1d + .5d = 15.75

:

.65d - .5 = 15.75

:

.65d = 15.75 + .5

:

.65d = 16.25

:

d = 16.25/.65

:

d = 25 dimes

:

Remember the statement "twice as many quarters as dimes."

q = 2(25)

q = 50 quarters

:

The statement "She has 10 more dimes than nickels"

n = 25 - 10

n - 15 nickels

:

Check our solutions

.05(15) + .1(25) + .25(50) =

.75 + 2.50 + 12.50 = 15.75 proves our solutions

8 0
2 years ago
Jamar's car used 1/40 ​ of a gallon to travel 3/8 ​ of a mile. How many miles can the car go on one gallon of gas?
dybincka [34]

Answer:

15 miles.

Step-by-step explanation:

3/8 x 40 = 120/8

now divide,

120/8 = 15

6 0
3 years ago
Hey can you please help me posted picture of question
Olenka [21]
Hello!

The variable "n" represents an exponent.

An exponent is used to multiply a number (b) by itself "n" times. For example, if the expression were to read (b²) it would represent the following:

b × b

The same could be said for (b³):

b × b × b

Even (b^{10}):

b × b × b × b × b × b × b × b × b × b

I hope this helps!
6 0
3 years ago
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