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nevsk [136]
3 years ago
15

It takes Ivanna 3 minutes to complete 2 problems on her math homework . How long will it take Ivanna to complete 12 problems?

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0

It will take her 18 minutes to complete 12 promblems you welcome

Oksana_A [137]3 years ago
5 0
18 you multiply the 6 to the 3 so if it took her 3 minutes for 2 it will take her 18 minutes for 12
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Does have an inverse? Why or why not?
Mkey [24]

A

A square matrix is invertible if its determinant is not zero.

The determinant for this matrix is

\begin{vmatrix}4&8\\7&14\end{vmatrix} = 4\cdot14 - 8\cdot7 = 56 - 56 = 0

so it does not have an inverse because its determinant is zero.

5 0
3 years ago
Approximately how many times greater is 2.3x10^-4 than 1.15x10^-8 ?
Minchanka [31]

Answer:

2.3 × 10^{-4} is 20,000 times greater than 1.15 × 10^{-8}

Step-by-step explanation:

Given as :

The first number= x = 2.3 × 10^{-4}

The second number= y = 1.15 × 10^{-8}

Let The first number is z times greater than second number

i.e x = z × y

Or, z = \dfrac{x}{y}

Or, z = \dfrac{2.3\times 10^{-4}}{1.15\times 10^{-8}}

Or, z = 2 × 10^{4}

∴  z = 20,000

So,The first number is 20,000 times greater than second number

Hence, 2.3 × 10^{-4} is 20,000 times greater than 1.15 × 10^{-8} . Answer

3 0
4 years ago
How do I do this problem
Lena [83]

First you multiply 3 times x and 3 times 2 

4(3(x + 2) -1) =50

and get

4( 3x +6 -1) =50

then you add 6 plus -1

4 ( 3x +5) = 50

then multiply 4 times 3x and 4 times 5

12x +20 = 50 and subtract 20 from both sides

       -20    -20

and you will get

12x = 30

divided both sides by 12

12x/12 = 30/12

then you find the ones that are the same amount in decimals but are smaller

and that's your answer: x= 5/2


hope you get it!!!

4 0
3 years ago
A barrel holds 50 l, how many gallons is this?
scoundrel [369]
The barrel holds 13.20 liters 
6 0
3 years ago
A painter uses 1.2 liters of the paint to cover 1m^2of the wall.
Hitman42 [59]

The amount of paint used is <u>8.4 litres</u>.

<h3>EXPLANATION</h3>

To work this out, you need to<em> times 1.2 by 7</em>, to get the answer of <u>8.4 litres</u>.

Hope this helps!

3 0
4 years ago
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