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3 years ago

John left a $3 tip, which was 15% of his bill. How much was his bill?

Mathematics

1 answer:

Luba_88 [7]3 years ago

5 0

Answer:

20$

Step-by-step explanation:

assume x being the bill

x * 15/100 = 3

x = 3 *100/15 = 20

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If $25,000 is borrowed with an interest of 8.0% compounded annually, what is the total amount of money needed to pay it

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Answer:

$\frac{8}{?100} \times 25000$

=2000

365×10=3650

2000×3650=7300000

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3 years ago

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Please help, find the value of y

Artyom0805 [142]

Answer

Step-by-step explanation:

chord makes or arc make 120° at the center.

sum of other two angles of triangle=180-120=60

because they are equal.

so each angle=60/2=30°

tangent line makes angle 90° with radius .

so 30+y=90

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3 years ago

How would you solve this? help.

Eddi Din [679]

Answer:

Center: (3,3)

Radius: $2\sqrt{5}$

Step-by-step explanation:

Midpoint and Distance Between two Points

Given two points A(x1,y1) and B(x2,y2), the midpoint M(xm,ym) between A and B has the following coordinates:

$\displaystyle x_m=\frac{x_1+x_2}{2}$

$\displaystyle y_m=\frac{y_1+y_2}{2}$

The distance between both points is given by:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Point (5,7) is the center of circle A, and point (1,-1) is the center of the circle B. Given both points belong to circle C, the center of C must be the midpoint from A to B:

$\displaystyle x_m=\frac{5+1}{2}=\frac{6}{2}=3$

$\displaystyle y_m=\frac{7-1}{2}=\frac{6}{2}=3$

Center of circle C: (3,3)

The radius of C is half the distance between A and B:

$d=\sqrt{(1-5)^2+(-1-7)^2}$

$d=\sqrt{16+64}=\sqrt{80}=\sqrt{16*5}=4\sqrt{5}$

The radius of C is d/2:

$r =4\sqrt{5}/2 = 2\sqrt{5}$

Center: (3,3)

Radius: $2\sqrt{5}$

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3 years ago

Are intersecting lines coplanar?

worty [1.4K]

yes it is always coplanar with two intersecting lines.

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3 years ago

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Find the least common denominator for these two rational expressions -5/s -1/2s

Ronch [10]

-5/s -1/2s
.The least common denominator is 2, since 2 is divisible by 1 and by 2

The answer will be : -5/s -1/2s = -10/2s - 1/2s = -11s/2

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3 years ago