All categories

3 years ago

Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?

1 answer:

5 0

Solve the equation 1/30 + 1/45 = 1/x

where x is the required time

multiply thru by 90x:-

3x + 2x = 90

x = 90 / 5 = 18

answer 18 minutes

You might be interested in

Help me answer the picture answer above!! Please answer all three and explain!

kolezko [41]

1. ABC and ADE are similar triangles because because its measures are proportional

2. x=4 because AD is twice AB

3. AE is twice the size of AC

8 0

3 years ago

What is the value of the expression, when x = 6?

rjkz [21]

Answer:

162

Step-by-step explanation:

7(3×6-4)+4^3

7(18-4)+4^3

7×14+4^3

98+64

162

5 0

2 years ago

Read 2 more answers

50 x 1 ten<br><br> What is the answer

My name is Ann [436]

Answer:

if its 50 X 10 then 500 if it is 50 X 1 then 50

Step-by-step explanation:

7 0

2 years ago

Which expression is equivalent to 36^-1/2

inn [45]

ANSWER

$( {36})^{ (- \frac{1}{2}) } = \frac{1}{6}$

EXPLANATION

The given expression is

${36}^{( - \frac{1}{2} )}$
This is having a negative index. We must first of all change to a positive index.

Recall that,

${a}^{ - m} = \frac{1}{ {a}^{m} }$

We apply this law of exponents to get,

${36}^{( - \frac{1}{2} )} = \frac{1}{ {36}^{( \frac{1}{2} )} }$

We cab rewrite the given expression to obtain;

${36}^{( - \frac{1}{2} )} = \frac{1}{ \sqrt{36} }$

This will simplify to give us,

${36}^{( - \frac{1}{2} )} = \frac{1}{ 6 }$

6 0

3 years ago

Read 2 more answers

(solve the following problem using integers. show ALL your work.)

yulyashka [42]

Answer:

Step-by-step explanation:

30+20=50

50-48=2

2+20+=22

22-18=4

if she has 30 then gets 20 she has 50. Then she spends 48 dollars leaving her with only 2 dollars. She then makes another 20 dollars so she now has 22 dollars. She spends 18 dollars leaving her with 4 dollars.

8 0

3 years ago