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Gnesinka [82]
2 years ago
12

Which equation is true when k = -15?

Mathematics
1 answer:
Inga [223]2 years ago
8 0

Answer:

c) k/3 + 17 = 12

#JUST A TEXT

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An 18% discount on a watch saved a shopper $72. Find the price of the watch before the discount
Mamont248 [21]
1% = $4

$4 × 100 = $400

$4 × 18 = $72

Your answer is $400
5 0
3 years ago
Including 5% sales tax, an inn charges $252 per night. Find the inn’s nightly cost before the tax is added
stira [4]

Hi,

To find the cost before tax, we must find out how much the tax is. So we multiply 252 x .05 to get 12.6. So we know the tax was 12.6 dollars. Now all we have to do is subtract that from the total to get our answer. 252 - 12.6 = 239.4.

Have a great day!

3 0
3 years ago
42. Error Analysis Describe and correct the error made
SashulF [63]

Answer:

(3x + 7)(3x - 7)

Step-by-step explanation:

9x² - 49 ← is a difference of squares and factors in general as

a² - b² = (a + b)(a - b) , then

9x² - 49

= (3x)² - 7²

This is where the error has been made in that 9x has been used instead of 3x

= (3x + 7)(3x - 7) ← in factored form

3 0
3 years ago
Markus has a box containing 10 red cards, 10 yellow cards, 10 blue cards and 10 green cards. He randomly selects one card, recor
natka813 [3]

Answer:

10red+10yellow+10blue+10green=40 cards

300/40= 7.5

each card should be statistically pulled 7.5 times. there are 10 yellow cards so a yellow card should be pulled 75 times.

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Tan(y)+ cot(y)/csc(y)= sec(y) prove identity
ArbitrLikvidat [17]

[tan(y) + cot (y)]/csc (y)

tan (y) = sin (y)/cos (y)
cot (y) = cos (y)/sin (y)
csc (y) = 1/sin (y).
Now rewrite the expression with the equivalent values

[sin (y)/cos (y) + cos (y)/sin (y) ] / [1/sin (y)]

1st, let's work the Numerator only = [sin (y)/cos (y) + cos (y)].
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or (cos² (y) + sin² (y) = 1, →Numerator = 1/[cos (y).sin(y)]

Denominator = csc (y) = [1/sin (y)], Then:

N/D = 1/[cos (y).sin(y)] / [1/sin (y)] =  [1 x sin (y)]/ [cos (y).sin (y)] = 1/cos (y)

 Or 1/cos (y) = sec (y) Q.E.D 
4 0
3 years ago
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