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4 years ago

Food pill: $9 Sales tax:6% Tip:20% Can you help me please

Mathematics

1 answer:

steposvetlana [31]4 years ago

3 0

Answer: $11.45

Step-by-step explanation:

Food pill: $9

Tax: 6%

Tip: 20%

$x=(9)+(9)(0.06)+[(9)+(9)(0.06)](0.20)\\x=11.45$

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3 years ago

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Describe the relationship between the value of the digits in the number 9,999,999

algol [13]

9 999 999 in words is read as nine million, nine hundred and ninety-nine thousand, and nine hundred and ninety-nine

By partitioning, we can write 9 999 999 as follow
9 000 000 + 900 000 + 90 000 + 9000 + 900 + 90 + 9

If we start at the first digit of '9' on the left, the next digit is ten times smaller than the previous one.

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3 years ago

What is the solution to the system of equations below? y = -2x - 6 and 2y = -4x - 12

katen-ka-za [31]

Answer: Infinitely Many Solutions

Step-by-step explanation:

Substitute y into the second equation:

2(-2x-6)=-4x-12

Then you get -4x-12=-4x=-12. Since this is 0=0 it would make it infinitely many solutions.

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3 years ago

The measure of one angle of an octagon is two times smaller that of the other seven angles. What is the measure of each angle?

Anestetic [448]

Answer:

7 of the angles measure 144 degrees each and one angle measures 72 degrees

Step-by-step explanation:

Let

x -----> represent the measures of the seven same-size angles,

x/2 ----> represent the measure of the one that is "two times smaller."

we know that

The sum of internal angles of a polygon can be calculated as:

$S=180^o(n-2)$

where

n is the number of sides of the polygon

In this case

n=8 (octagon)

substitute

$S=180^o(8-2)=1,080^o$

The linear equation that represent this problem is

$\frac{x}{2}+7x=1,080$

solve for x

$\frac{15x}{2}=1,080\\\\15x=2,160\\\\x=144^o$

$\frac{x}{2}=72^o$

therefore

7 of the angles measure 144 degrees each and one angle measures 72 degrees

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3 years ago

Marcy determined that her father's age is the quotient of her age and 5, increased by 10. If x represents Marcy's age, write an

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Answer:

x / 5 + 10 or

Step-by-step explanation:

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3 years ago