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Olin [163]
3 years ago
9

Help ASAP!! Math problems

Mathematics
1 answer:
const2013 [10]3 years ago
5 0

Answer:

7. C

8. D

Step-by-step explanation:

7. The interest rate is 8% or .08. You find that by solving I=Prt (interest=original amount*rate*time in years)

8. The discounted price would be $48 (80*(1-.40)) Then you multiply that 48 by .08 and add that amount to the $48.

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(Pleave give the CORRECT answer, I will give out brainliest to this correct answer. Don't make up something to get brainliest be
Alex17521 [72]

Answer:

Size 50

Step-by-step explanation:

You should choose the larger sample size.  This is because if you take the mean, it will help to cancel out outliers.  For instance, most people exercise half an hour.  With sample size of 10, there might be one person who doesn't exercise, thus dragging down the mean.  A larger sample size would have a greater ratio of "average" people.

3 0
3 years ago
Factor: 64v^4 - 225w^10
love history [14]

Answer:

(8v^2-15w^5)(8v^2+15w^5)

Step-by-step explanation:

STEP 1:

8^{2}v^{2*2} - 15^{2}w^{2*5}

STEP 2:

8^{2} * (v^{2})^{2} - 15^{2} * (w^{5})^{2}

STEP 3:

(8v^2)^2 - (15w^5)^2

STEP 4:

(8v^2-15w^5)(8v^2+15w^5)

6 0
3 years ago
What is 2/3 of a rotation
barxatty [35]

Answer:

240

Step-by-step explanation:

if 1 full rotation is 360 degrees than 1/3 rotation is 120 degrees so 2/3 must be 240 degrees

8 0
3 years ago
X^y=y^x and x=2y prove that y=2.
irinina [24]

Answer:

{x}^{y}  =  {y}^{x}  \:  -  -  -  (1)

x = 2y \:  -  -  - (2)

Substitute (2) into (1):

{2y}^{y}  =  {y}^{2y}

Log both sides:

lg(2 {y}^{y} ) = lg(y^{2y} )

y \: lg(2y) = 2y(lg \: y)

y \: lg(2) + y \: lg(y) = 2y \: lg(y)

y \: lg(2) = 2y \: lg(y) - y \: lg(y)

y \: lg(2) = y \: lg(y)

Divide by y on both sides:

lg(2) = lg(y)

{10}^{lg(2)}  =  {10}^{lg(y)}

2= y

y= 2 (proved)

Explanation:

• step 5: lg(m)^n= nlg(m)

• Step 6: lg(mn)= lg(m) +lg(n)

7 0
3 years ago
Find the slope of (-4,-3) (8,9)
densk [106]
The slope is y2-y1/x2-x1 = 9-(-3)/8-(-4)=9+3/8+4= 12/12=1
So the slope is 1

5 0
3 years ago
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