Ask question

Ask question

All categories

3 years ago

11

Bella has 8 pies and she can make 2 pies an hour. Tina has 2 pies and she can make 3 in an hour. How many hours will it take for

Tina to have as many pies as Bella?

1 answer:

Alika [10]3 years ago

6 0

Answer:

6 hours

Step-by-step explanation:

You might be interested in

What type of stock receives an equal part of the profits on each share to be distributed after all other obligations of a compan

solong [7]

I think the answer is A. Common

6 0

3 years ago

Read 2 more answers

Which list shows the numbers in order from least to greatest?

dem82 [27]

Answer:

7.41, 7.6, 745

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

An initial investment of $60.00 increases in value by 15% each year. Which of the following statements are true? Select all that

aivan3 [116]

The situations can be represented by the exponential function f(x)=60x1.15^x
After 7.86 years the value of the investment will be three times the initial value (If you round to the nearest dollar)
After 8 years the value of the investment will be $184.00 (If you round to the nearest dollar)

3 0

3 years ago

Read 2 more answers

Use a matrix to solve the system:

Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

$2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\$

Rewrite these equations in matrix form

$\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\$

we can write it like this,

$AX=B\\X=A^{-1}B$

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

$A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right] \\$

now multiply the matrix with B

$X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\$

4 0

3 years ago

Sin a ______ = 1/2 [ sin ( a + b ) + sin ( a - b) ]

Neko [114]

Answer:

Cos b

Step-by-step explanation:

1/2[sin(a+b)+sin(a-b)]

1/2[sin a cos b +cos a sin b + sin A cos B - cos A sin B]

1/2[2sin a cos b]

sin a cos b

6 0

3 years ago