$\left[\begin{array}{cc}3&5\\6&-1\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}7\\-8\end{array}\right]\\\left[\begin{array}{cc|c}3&5 &7\\ 6& -1 & -8\end{array}\right] \rightarrow \left[\begin{array}{cc|c}3&5& 7\\0&-11 & -22\end{array}\right] \rightarrow \left[\begin{array}{cc|c}3&5& 7\\0&1 & 2\end{array}\right]\\3x +5y = 7\\\\y = 2\\\therefore x = -1$

6 0

3 years ago

A box contains

Usimov [2.4K]

the probability that a pen from the first box is selected
= total number of pens in 1st box/total number of objects in box 1
= 5/12

the probability that a crayon from the second box is selected
= total number of crayons in 2nd box/total number of objects in box 2
= 6/8 = 3/4

7 0

3 years ago

An ice cube is made of 5 fluid ounces of water. About how many milliliters of water does it take to make an ice cube

Sergio [31]

ANSWER:

147.868 mL of water is required to make an ice cube.

SOLUTION:

Given that, an ice cube is made up of 5 fluid ounces of water.

We need to find how many milli liters of water does it require to make an ice cube.

For, that we have to convert 5 fluid ounces in to units of milli liters.

We know that, 1 US fluid ounce equals to 29.5735 milli liters. i.e. 1 US fluid ounce = 29.5735 mL

Now,

An ice cube is made by 5 fluid ounces = 5 x 1 fluid ounce

= 5 x 29.5735 mL = 147.868 mL

Hence, 147.868 mL of water is required to make an ice cube.

5 0

3 years ago

There are 100 cents in a dollar what percent of a dollar is $0.15 a​

There are 100 cents in a dollar what percent of a dollar is $0.15 a