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3 years ago

Simplify the following expression. 3m+4n-6n

Mathematics

1 answer:

Ksju [112]3 years ago

8 0

Answer:

3m-2n

Step-by-step explanation:

xd..............

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A shop sells pairs of trainers for £68 each. They make a percentage profit of 70% on each pair.

Klio2033 [76]

Answer:

47.6 euros

Step-by-step explanation:

68 x .70 = 47.6

.70 = 70%

70% of 68

of means multiply

You turn the percent into a decimal and multiply

5 0

2 years ago

Why is it important to be able to write a fraction is simplest form?

ziro4ka [17]

Being able to write fractions in simplest form can make operations much easier. Also, to compare fractions, some may have to be in the simplest form.

6 0

3 years ago

Read 2 more answers

Need help? ASAP please

Zanzabum

Answer:

First one!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

5 0

3 years ago

The monthly revenue of a certain company is given by R 820p-7p, where p is the price in dollars of the product the company manuf

lora16 [44]

The revenue will be 12,000 when the price of the product is $100

Given :

The monthly revenue of a certain company

$R=820p-7p^2$

We need to find out p when Revenue R is 12000

Lets replace R with 12000 and solve for p

$12000=820p-7p^2\\820p-7p^2=12000\\-7p^2+820p-12000=0$

Apply quadratic formula

$p=\frac{-820\pm \sqrt{820^2-4\left(-7\right)\left(-12000\right)}}{2\left(-7\right)}\\p=\frac{-820\pm \:580}{2\left(-7\right)}\\p=\frac{-820+580}{2\left(-7\right)},\:p=\frac{-820-580}{2\left(-7\right)}\\p=\frac{120}{7},\:p=100$

Given that price must be greater than 50

So the revenue will be 12000 when the price of the product is $100

Learn more : brainly.com/question/21503855

5 0

2 years ago

The rate at which a quantity M of a certain radioactive substance decays is proportional to the amount of the substance present

anzhelika [568]

Answer:

2. dM/dt = -0.11M

Step-by-step explanation:

Differential equations for proportional amouts:

A differential equation for proportional amounts is given by:

$\frac{dx}{dt} = ax$

In which a is the constant rate. If the amount increases, a is positive. If it decays, b is positive.

In this question:

Decays, so a < 0.

Proportional to the amount of the substance present at a given time, which means that a multiplies the amount M.

This means that the correct answer is given by option 2.

3 0

3 years ago