All categories

3 years ago

Can someone help me with question 3 i really dont understand this.

Mathematics

2 answers:

photoshop1234 [79]3 years ago

7 0

For one week she plays 7 days and on each day she spends 2 hours.
That is why you have to multiply 2*7.

makvit [3.9K]3 years ago

5 0

Answer:28 hours

Step-by-step explanation:

2x7x2

You might be interested in

Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280lb mixt

TiliK225 [7]

0.14x + 0.07(280-x) = 0.08*280

0.14x + 19.6-0.07x = 22.4

0.07x + 19.6 = 22.4

0.07x = 2.8
x = 2.8 / 0.07 = 40
x = 40 pounds of Soybean
280 -40 = 240 of cornmeal

7 0

3 years ago

Use the slope formula <br> (19,-16) (-7,15)

AURORKA [14]

Answer:

-31/26

Step-by-step explanation:

To find the slope

m= ( y2-y1)/(x2-x1)

= ( 15 - -16)/(-7 - 19)

= ( 15+16)/(-7-19)

= 31/ -26

-31/26

5 0

2 years ago

Lincoln invested $15,000 in an account paying an interest rate of 3\tfrac{1}{2}3 2 1 % compounded continuously. Harper investe

wolverine [178]

Answer:

54750

Step-by-step explanation:

3 0

2 years ago

Select the correct answer. Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% ch

GREYUIT [131]

Answer:

Option A 0.1698

Step-by-step explanation:

Given that Jason has a chance for getting oil as 45%

THe kit he buys show accurate result with 80% probability

Let A1- Event that the land has oil

A2 - Event that the land has no oil

B- The test gives negative result

A1 and A2 are mutually exclusive and exhaustive

P(A1) = 0.45 and P(A2) =0.55

Hence we can use Baye theorem

Then P(B) = P(A1B)+P(A2B)= $0.45(0.20)+0.55(0,80)\\=0.09+0.0.44\\=0.53$

Reqd prob =P(A1/B) =

$\frac{P(A1B)}{P(B)}\\ =\frac{0.09}{0.53}\\\\=0.1698$

3 0

2 years ago

Complete the question.

makvit [3.9K]

Answer:

Step-by-step explanation:

You are looking for the cross section of ask three circles. This is true for the smallest part, with the number 6 in it.

5 0

2 years ago