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Svetach [21]
2 years ago
9

Yolanda purchase a prepaid phone card for $25 long distance calls cost $0.07 a minute using disk are you allowed to use her car

only once to make a long-distance call its remaining credit on her card is $23.18 how many minutes did her call last
Mathematics
1 answer:
Inessa05 [86]2 years ago
8 0

Answer : 331 minutes

Step-by-step explanation:

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Suppose y varies directly as x, and y = 21 when x = 3. Find x when y = 42.
nata0808 [166]

Answer:

x = 24

Step-by-step explanation:

y₂ - y₁

42 - 21 = 21

x + 21

3 + 21 = 24

So when y increases by 21, so does x.

x = 24

7 0
3 years ago
The list price of a diamond ring is $662. The jeweler is offering a chain discount of 15% less 10%. What is the final net price
Tom [10]
Your answer is 506.44.

multiply 662 x .10 now minus that answer from 662 to get 595.80

now multiply that by .15

now minus that by 595.80

gives you 506.43
4 0
2 years ago
Write the quadratic function in standard form.<br> f(x) = -x2 + 2x + 4<br> f(x) =
goldenfox [79]

Answer:

f(x)=-1(x-2)^2+8

Step-by-step explanation:

Given:

The quadratic function is given as:

f(x)=-x^2+2x+4

The standard form of a quadratic function is given as:

f(x)=a(x-h)^2+k, where, 'a', 'h' and 'k' are real numbers.

Now, in order to convert the given function to standard form, we use completing by  square method.

-x^2+2x=-(x^2-2x)=-[(x-2)^2-2^2]=-[(x-2)^2-4]=-(x-2)^2+4

Now, f(x)=-x^2+2x+4 can be rewritten as:

f(x)=-(x-2)^2+4+4\\f(x)=-1(x-2)^2+8

Therefore, the standard form of the function is:

f(x)=-1(x-2)^2+8

7 0
3 years ago
A bicycle tire has a radius of 26 inches. How many revolutions will this tire make if the bicycle is pedaled 1 mile? (Use 3.14 f
Fittoniya [83]
How far does a wheel move when it rotates once? The length of the outside of the tyre? Isn't that the same as the circumference?
4 0
2 years ago
A=14 and b=6
Ostrovityanka [42]

Answer:

#1. Insert the given values into the equation:

Simplify multiplication from left to right:

Simplify subtraction:

#2. Insert the given values into the equation:

Use PEMDAS. Simplify multiplication:

Simplify division:

#3. Insert given values into the equation:

Use PEMDAS. Simplify parentheses:

Use PEMDAS. Simplify multiplication:

Simplify subtraction:

3 0
2 years ago
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