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3 years ago

Help on question number 5. Please

Mathematics

1 answer:

Georgia [21]3 years ago

6 0

Answer:

Step-by-step explanation:

First you set up a porportion then times 15 ×60 divided by one hundred so it would be B

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solniwko [45]

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3 years ago

I NEED HELP IM LATE PLEASE

Inga [223]

Answer:

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Step-by-step explanation:

x(2x+7)-2x(x-1)

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3 years ago

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Helen [10]

Answer: A .0115

Step-by-step explanation:

There are 1000 mg in a gram. So to convert to grams, you would divide by 1000

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3 years ago

Read 2 more answers

A container contains water at temperature 80 degree celcius. After every 10 minutes, the change in temperature is - 4 degree cel

lilavasa [31]

For this case, the first thing we must do is define variables.
We have then:
x: number of minutes
y: final temperature
We write then the equation that models the problem:
$y = (-4/10) x + 80
$
For y = 20 we have:
$20 = (-4/10) x + 80
$
Clearing x:
$(4/10) x = 80 - 20

x = (10/4) * 60

x = 150$
Answer:
The temperature of the water will be 20 degree celcius after 150 minutes

4 0

3 years ago

Two trains, Train A and Train B, weigh a total of 489 tons. Train A is heavier than Train B. The difference of their weights i

makvit [3.9K]

Answer:

Weight of Train A = 454 tons

Weight of Train B = 35 tons

Step-by-step explanation:

It is given that:

Let,

A represent weight of Train A

B represent weight of Train B

According to given information:

A + B = 489 Eqn 1

A - B = 419 Eqn 2

Adding Eqn 1 and 2

A + B + A - B = 489 + 419

2A = 908

Dividing both sides by 2

$\frac{2A}{2}=\frac{908}{2}\\A = 454$

Putting A = 454 in Eqn 1

454 + B = 489

B = 489 - 454

B = 35

Therefore,

Weight of Train A = 454 tons

Weight of Train B = 35 tons

5 0

2 years ago