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marusya05 [52]
3 years ago
5

A store is marking down the price of a television 25 percent from the original price of $250. Which expression can be used to

Mathematics
1 answer:
nikitadnepr [17]3 years ago
8 0

Answer:

$250 - (25) (250)

Step-by-step explanation:

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K^2+8k-9=0 can you help me solve with showing work
givi [52]
Using the PSN method:

P = -9
S = 8
So N = 9,-1

Using 9 and -1 in the original equation gives:

k^2+9k-k-9=0
\\k(k+9)-1(k+9)=0
\\(k-1)(k+9)

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7 0
3 years ago
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R is the first quadrant region enclosed by the x-axis and the curve y = 2x + b, and the line x = b, where b > 0. Find the val
Elis [28]
The area of R is given by the integral

\displaystyle\int_0^b(2x+b)\,\mathrm dx=288

Integrating yields

(x^2+bx)\bigg|_{x=0}^{x=b}=(b^2+b^2)-(0+0)=2b^2

So you have

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3 years ago
Could someone just explain how to solve this for the two sides? We learned 30 60 90 triangles not 29 61 90 triangles
natta225 [31]

Step-by-step explanation:

Use SOH-CAH-TOA.

Sine = Opposite / Hypotenuse

Cosine = Adjacent / Hypotenuse

Tangent = Opposite / Adjacent

Side a is adjacent to the 29° angle, and 14 is opposite of the 29° angle.  So use tangent:

tan 29° = 14 / a

a = 14 / tan 29°

a ≈ 25.3

Side c is the hypotenuse, and 14 is opposite of the 29° angle.  So use sine:

sin 29° = 14 / c

c = 14 / sin 29°

c ≈ 28.9

5 0
3 years ago
Find the coordinate of the vertex of the following parabola algebraically!<br> y=-4x² – 20
tester [92]

Answer:

The vertex of a parabola is found by

'h' position = -b / (2 * a) = 0 / 2 * -4 = 0

'y' position = ah^2 + bh + c = -4*0 + 0 -20

vertex = (0, -20)

Step-by-step explanation:

5 0
3 years ago
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 445445 gram setting. Is
ExtremeBDS [4]

Answer: there is no sufficient evidence

Step-by-step explanation: We need to perform an hypothesis test on the average gram setting on the machine before we can draw out a conclusion.

We need the sample mean, either of population or sample standard deviation and sample size to perform the test.

None of these parameters was given to us, hence we don't have enough sufficient evidence to prove the statement.

8 0
3 years ago
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