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mina [271]
3 years ago
12

For the restaurant bill find the exact amount of the tip. State your answers to the nearest hundredth. The restaurant bill is $9

2.20. Give the exact amount of a 15% tip
Mathematics
1 answer:
stich3 [128]3 years ago
7 0
$13.80

Or $13.83 not rounded.
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Sqrt(2x-6)=3-x<br> Solve for x
soldi70 [24.7K]

Answer:

x = 3

Step-by-step explanation:

\sqrt{2x - 6}  = 3 - x

Square both sides of the equation

2x - 6 = (3 - x)^{2} = 9 - 6x + x^{2} \\

x^{2}  - 8x + 15 = 0\\

(x - 3)(x - 5) = 0

x = 3 or 5

Now, you must always check your results because a result may not satisfy the original equation.

If x = 3, then \sqrt{2x - 6} = \sqrt{2(3) - 6} = \sqrt{6 - 6}  = \sqrt{0} = 0  and 3 - x = 3 - 3 = 0

So 3 satisfies the original.

If x = 5, then \sqrt{2(5) - 6}  = \sqrt{10 - 6} = \sqrt{4} = 2,  but 3 - x = 3 - 5 = -2.  Therefore, 5 does NOT satisfy the original equation.

That means that x = 3 is the solution to the equation.

5 0
3 years ago
In the figure, b and c are parallel lines. Which of the following statements are true?
Helen [10]

Answer:

1. No, Joe is not correct

2. \angle 5=72^{\circ}

Step-by-step explanation:

Given: b and c are parallel lines

To find:

1. whether the given statement is correct or not

2. \angle 5

Solution:

1.

Sum of two angles that form a linear pair is equal to 180^{\circ}

\angle 3+72^{\circ}=180^{\circ} (linear pair)

\angle 3=180^{\circ}-72^{\circ}=108^{\circ}\neq 90^{\circ}

So, Joe is not correct

2.

If two lines are parallel then alternate interior angles are equal.

As b and c are parallel lines,

\angle 5=72^{\circ} (alternate interior angles)

4 0
3 years ago
Teresa is in need for help ;-; pls help her! (lolllllllllllllllllllllllllllllllllllllllllllllllllll)
nata0808 [166]
90

the answer is 90 but the answer i give has to be over 20 characters so i'm typing random things. have a good day:)
4 0
3 years ago
Read 2 more answers
How do i turn 2/5 into a percentage
likoan [24]
Numerator divided by the denominator then multiplied by 100. 

(2/5) * 100
7 0
3 years ago
A circle has a circumference whose length is 25 pi find the length of an arc whose central angle is 90 dregree
Dvinal [7]

An answer could be 33333223.237


6 0
3 years ago
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