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3 years ago

. Which calculation best matches the expression 3+2?

Mathematics

2 answers:

elena-s [515]3 years ago

8 0

Answer:

3+2=5

Step-by-step explanation:

zepelin [54]3 years ago

8 0

Answer:

3+1+1

Step-by-step explanation:

3+1+1=5, and 1+1=2, and 3+2=5.

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Six men completed a task in 24 hrs and 48 min. How long, in hours and minutes, would it take four men to complete the same task?

igor_vitrenko [27]

Answer:

It would take 4 men 37 hrs and 12 mins to complete the same task.

step-by-step explanation:

Let X be the time the four men would use to complete the task.

From the question, 6 men completed a task in 24 hrs and 48 mins

But

$24 \: hrs \: 48 \: mins = 24(60mins) + 48 \: mins=1488 \: mins$

Using ratio and proportion

$6 \: men:1488 \: mins$

$4 men:x\:mins$

if more, less divides and if less, more divides.

4 men required more time to complete the task

Hence:

$x = \frac{6}{4} \times 1488 \: mins$

$x = 2232 \: mins$

x = 37 hrs 12 mins

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3 years ago

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lina2011 [118]

Answer:

Step-by-step explanation:

If you count the amount of units between point A and point C, it is 5 units

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3 years ago

Read 2 more answers

Tina practiced piano for 15 hours last month and 45 hours this month A. Use multiplication to write a statement comparing the ho

KonstantinChe [14]

Answer: The answer is (a) 3 × x = y and (b) x + x + x = y.

Step-by-step explanation: Let 'x' and 'y' denote the number of hours that Tina practised last month and this month respectively.

Then, according to the given information, we have

x = 15 and y = 45.

We can write the relation between 'x' and 'y' in two forms as follows -

(a) Multiplication form : 3 × 5 = 15 implies 3 × x = y.

(b) Addition form : 15 +15 +15 = 45 implies x + x + x = y.

Thus, the answers are (3 × x = y) and (x + x + x = y).

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3 years ago

Graph the inequality. - 2x + 3y < -12

mars1129 [50]

The points are on, (0,6) and (-4,0), its a dotted line and is shaded down.

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2 years ago

Doreen Schmidt is a chemist. She needs to prepare 32 ounces of a 13% hydrochloric acid solution. Find the amount of 16% soluti

klasskru [66]

Answer:

She should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

Step-by-step explanation:

Given:

Doreen Schmidt needs to prepare 32 ounces of a 13% hydrochloric acid solution.

Now, to find the amount she should mix of 16% solution and of 8% solution.

Let the 16% solution amount be $x.$

And let the 8% solution amount be $y.$

So, the total ounces of solution:

$x+y=32$

$y=32-x$ .......(1)

Now, to solve the equation to get the solution she should mix:

$16\%\ of\ (x)+8\%\ of\ (y)=13\%\ of\ (32)\\\\\frac{16}{100}\times x+\frac{8}{100}\times y=\frac{13}{100}\times 32$

$0.16x+0.08y=0.13\times 32$

Substituting the value of $y$ from equation (1) we get:

$0.16x+0.08(32-x)=4.16$

$0.16x+2.56-0.08x=4.16$

$2.56+0.08x=4.16$

Subtracting both sides by 2.56 we get:

$0.08x=1.6$

Dividing both sides by 0.08 we get:

$x=20.$

The 16% solution amount = 20 ounces.

Now, substituting the value of $x$ in equation (1) we get:

$y=32-x\\\\y=32-20\\\\y=12.$

The 8% solution amount = 12 ounces.

Therefore, she should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

6 0

4 years ago