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2 years ago

One way to divide decimal numbers is to use an equivalent expression.

Mathematics

1 answer:

Umnica [9.8K]2 years ago

6 0

Answer:

Step-by-step explanation:

To determine how much a decimal was multiplied, you need to find how many places the decimal moved.

In this case we can see the decimal moved once. How many times the decimal moved can be represented by the zeros in the number. So 10 = 1

100 = 2 1,000 = 3 and it keeps going.

So since the decimal moved 1 time, the answer to question one is 10

Now question 2.

Both 8.4 ÷ 2.1 and 84 ÷ 21 will give the exact same answer. It is just easier to solve. So solve which one is easier for you. I did 84 ÷ 21.

84 ÷ 21 = 4

We can verify our answer by multiplying the the divisor by the quotient

21 * 4 = 84

So 4 is the answer to question 2

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If I was asked to think of a number and multiply it by 2, I could

skad [1K]

Answer:

Step-by-step explanation:

u use the equation 2x

so It looks like this...2(3)

so the result is 6

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3 years ago

A 15% dextrous solution ( 15 mg per 100 ml of solution is given intravenously. Suppose a total of 4.086 L of the solution is gi

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Step-by-step explanation:

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3 years ago

What is the solution to he equation (y/y-4)-(4/y+4)=3^2/y^2-16

kicyunya [14]

Answer:

$y=\pm i \sqrt{7}$

Step-by-step explanation:

Given equation is $\frac{y}{\left(y-4\right)}-\frac{4}{\left(y+4\right)}=\frac{3^2}{(y^2-16)}$

Factor denominators then solve by making denominators equal

$\frac{y}{\left(y-4\right)}-\frac{4}{\left(y+4\right)}=\frac{3^2}{(y^2-16)}$

$\frac{y}{\left(y-4\right)}-\frac{4}{\left(y+4\right)}=\frac{9}{(y+4)\left(y-4\right)}$

$\frac{y\left(y+4\right)-4\left(y-4\right)}{\left(y-4\right)\left(y+4\right)}=\frac{9}{(y+4)\left(y-4\right)}$

$y\left(y+4\right)-4\left(y-4\right)=9$

$y^2+4y-4y+16=9$

$y^2=9-16$

$y^2=-7$

take squar root of both sides

$y=\pm \sqrt{-7}$

$y=\pm i \sqrt{7}$

Hence final answer is $y=\pm i \sqrt{7}$ .

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3 years ago

Ann increased the quantities of all the ingredients in a recipe by 60%, percent. She used 80 grams , of cheese. How much cheese

VladimirAG [237]

Answer:

The recipe originally required 50 grams of cheese.

Step-by-step explanation:

1.6x=80

x=50

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3 years ago

Solve the formula for the variable 1. f = 1/2(r 6.5)

Elina [12.6K]

F = 1/2(r + 6.5)
2f = r + 6.5
r = 2f - 6.5

8 0

2 years ago