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2 years ago

John's dinner bill totaled $75. He left a 15% tip. How much money did John leave for a tip?

Mathematics

2 answers:

Vlad1618 [11]2 years ago

7 0

Answer:

he left $11.25

Step-by-step explanation:

hope this helps :)

Dimas [21]2 years ago

6 0

Answer:

$7.20

Step-by-step explanation:

because I know but do bzizbzjzbzj

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The seventh-grade class is building target areas for a PE activity. The bases for the game will be circular in shape. The diamet

Scilla [17]

To calculate the area it is pi*r^2

so since r = 1/2 d

2.5^2 * pi = area
or
19.625

8 0

2 years ago

Please help me with these, oh sweet jesus

Lelechka [254]

Answer:

77. $\cot^{6} x = \cot^{4} x \csc^{2}x - \cot^{4} x$ Proved

78. $\sec^{4}x \tan^{2} x = \sec^{2}x [\tan^{2}x + \tan^{4}x ]$ Proved

79. $\cos^{3} x\sin^{2} x = [\sin^{2}x - \sin^{4}x] \cos x$ Proved.

80. $\sin^{4}x - \cos^{4}x = 1 - 2\cos^{2}x + 2 \cos^{4} x$ Proved.

Step-by-step explanation:

77. Left hand side

= $\cot^{6} x$

= $\cot^{4} x \times \cot^{2} x$

= $\cot^{4}x [\csc^{2}x - 1]$

{Since we know, $\csc^{2} x - \cot^{2}x = 1$ }

= $\cot^{4} x \csc^{2}x - \cot^{4} x$

= Right hand side (Proved)

78. Left hand side

= $\sec^{4}x \tan^{2} x$

= $\sec^{2} x [1 + \tan^{2}x] \tan^{2} x$

{Since $\sec^{2}x - \tan^{2}x = 1$ }

= $\sec^{2}x [\tan^{2}x + \tan^{4}x ]$

= Right hand side (Proved)

79. Left hand side

= $\cos^{3} x\sin^{2} x$

= $\cos x[1 - \sin^{2} x] \sin^{2} x$

{Since $\sin^{2}x + \cos^{2} x = 1$ }

= $[\sin^{2}x - \sin^{4}x] \cos x$

= Right hand side

80. Left hand side

= $\sin^{4}x - \cos^{4}x$

= $[\sin^{2}x + \cos^{2}x]^{2} - 2\sin^{2} x \cos^{2}x$

{Since $\sin^{2}x + \cos^{2} x = 1$ }

= $1 - 2\cos^{2} x[1 - \cos^{2}x ]$

= $1 - 2\cos^{2}x + 2 \cos^{4} x$

= Right hand side. (Proved)

7 0

2 years ago

Point Q is the image of Q (-5,1) under a translation by 6 units to the right and 2 units down.

Alex787 [66]

Answer:

(1,-1)

Step-by-step explanation:

The graph is being shifted 6 units to the right which affects the x-value and it is also being affected 2 units down which affects the y-value.

6 0

2 years ago

tabitha wants to find the total cost of a new tablet computer that has a origanall cost of $360 from a store having a 20% sales

Eva8 [605]

ANSWER: $432

STEP-BY-STEP EXPLANATION:

The cost of the tablet is $360

Then Tabitha has to pay 20% sales tax.

The tax is the prices times 20% plus the original price

360 ( 1+ 0.2)

360 (1.2)

=432

8 0

2 years ago

How do you factor 4a^2+11a-20

bixtya [17]

You have to factor by grouping.
(4a - 5) (a + 4)

4 0

2 years ago