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sdas [7]
3 years ago
15

What is the percent change of a price decreased from $25 to $10 ?

Mathematics
1 answer:
GalinKa [24]3 years ago
6 0
25  -  10        1             1                5           2                 3
_______      ___    -    ___          ____  -   ____   =      ___    =    .15  =  15%

   100             4             10            20         20                20
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HELP PLEASE DUE IN 30 MINS!!!!!!!!!
pshichka [43]

Step-by-step explanation:

25 = 3.75

\frac{25}{3.75}

1 = 0.15

90 = 12.60

1 = 0.14

hope it helps you ☺️

7 0
2 years ago
Read 2 more answers
Sorry for the bad quality.
ser-zykov [4K]

Answer:

B and C

Step-by-step explanation:

8 0
3 years ago
(80 POINTS) What rule describes a dilation with a scale factor of ½ and the center of dilation at the origin?
lesya [120]

Answer:

C

Step-by-step explanation:

(x, y) -> (1/2x, 1/2y)

When you dilate a side, point, etc, you are multiplying the original dimension by the scale factor. That is represented in option C: the original x and y are multiplied by the scale factor, 1/2! Hope that helps! :)

6 0
3 years ago
Read 2 more answers
1) James needs to obtain $80,000 for his daughter's future college tuition. He is looking to invest in an
Mazyrski [523]

Answer:

$ 50,340.97

Step-by-step explanation:

From the above question, we can deduce that we are to find the Initial amount invested which is also called the Principal.

The formula to find Principal in a compound interest question is:

P = A / (1 + r/n)^nt

Where:

A = Total Amount obtained after invested = $80,000

r = Interest rate = 3.1% = 0.031

n = number of times interest in compounded = Quarterly = 4

t = time in years = 15

P = $80,000/(1 + 0.031/4)^4 × 15

P = $80,000/(1 +0.00775)^60

P = $ 50,340.97

Hence, James would have to invest $50,340.97 today to have $80,000 in 15 years.

3 0
3 years ago
(1 - cosx) (1 + 1/cosx) = sinxtanx
Nataly [62]

Answer:

cos x ≠ 0 ⇔ x ≠ \frac{pi}{2}+k.pi ; k ∈ N

(1-cosx)(1+\frac{1}{cosx})=sinx.tanx\\\\(1-cosx)(\frac{cosx+1}{cosx})=sinx.\frac{sinx}{cosx}\\\\ \frac{1-cos^{2} x}{cosx} =\frac{sin^{2}x }{cosx}\\\\=>1-cos^{2}x=sin^{2}x

<=> cos²x + sin²x = 1

⇔ 1 = 1

=> x =  { R \ (pi/2 + k.pi); k ∈ N}

Step-by-step explanation:

5 0
3 years ago
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