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4 years ago

A question from my math class:

Mathematics

1 answer:

valina [46]4 years ago

7 0

Answer:

A) $29.68

B) $5.60

Step-by-step explanation:

Part A Explanation)

To find the total cost including tax, you must multiply the total cost by .06 because .06 out of 1 is 6%. Quick explanation on percentages.

DO NOT FORGET TO ADD THE TOTAL COST

28.00 + (28.00 * .06) = 29.68

Part B Explanation)

This is asking only for the tip, not including the total cost. However, we need the total cost to calculate the tip.

28.00 * .20 = 5.6

.20 out of 1 is 20%

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Evaluate 4(2b+1) to the third power if b=-3

mrs_skeptik [129]

Answer:

28 is the answer pls mark brainliest

4 0

4 years ago

Find the inverse function. f (x)=1/2x+6

Lana71 [14]

The inverse of this function is f(x) = 2x - 12.

You can find the inverse of any function by switching the f(x) and x values in the equation. Then you can solve for the new f(x) value. The result is your inverse function. The work for this one is below.

f(x) = 1/2x + 6 ----> switch f(x) and x

x = 1/2f(x) + 6 ----> subtract 6

x - 6 = 1/2f(x) ----> multiply by 2

2x - 12 = f(x) ----> change the order for consistency.

f(x) = 2x - 12

7 0

3 years ago

Can someone help me find the value of x?

Juliette [100K]

Answer:

x=71

Step-by-step explanation:

Since this is an isosceles triangle the bottom 2 angles are equal.

The three angles of the triangle are x, x, and 38. They must add to 180 degrees

x+x+38 = 180

Combine like terms

2x+38=180

Subtract 38 from each side

2x+38-38 = 180-38

2x = 142

Divide each side by 2

2x/2 =142/2

x =71

5 0

4 years ago

Polygons QRST and Q′R′S′T′ are shown on the following coordinate grid: A coordinate plane with two polygons is shown. Polygon QR

creativ13 [48]

As you can see from the picture you have:
to rotate point S about the origin by $90^0$ clockwise to form point S'';
to rotate point R about the origin by $90^0$ clockwise to form point R'';
to rotate point Q about the origin by $90^0$ clockwise to form point Q'';
to rotate point T about the origin by $90^0$ clockwise to form point T''.
Then you have to translate polygon Q''R''S''T'' 1 unit down.
Note that rotation $90^0$ clockwise is the same as rotation $270^0$ counterclockwise, so the correct answer is rotating $270^0$ counterclockwise about the origin and translating 1 unit down.