All categories

3 years ago

The sum of two numbers is 21.

Mathematics

2 answers:

mafiozo [28]3 years ago

7 0

Answer:

Pretend that x and y represents the 2 numbers that we need to find.

According to the information, we know that:

x + y = 21

6x = y

Replace y in the first equation with 6x (because they are equal to each other according to the second equation):

x + y = 21

x + 6x = 21

7x = 21

x = 21/7 = 3

Now have two ways to find y, both will give us the same result:

3 + y = 21 ⇔ y = 21 - 3 = 18

6 · 3 = y ⇔ y = 18

So the numbers that we need to find are 3 and 18.

klio [65]3 years ago

7 0

Answer:

3 and 18.

Step-by-step explanation:

If one number is x then the other is 6x.

So, x + 6x = 21

7x = 21

x = 3.

The other number is 21 - 3 = 18.

You might be interested in

Amelia and 2 of her friends went out to lunch. Each girl ordered exactly the same meal. The total cost was $55.08,which included

Murrr4er [49]

Possibly $16.89 because you multiply 55.08 and .08 to find 4.41 then you subtract that to 55.08 to find the total cost without tax which is 50.67. Then you divide by 3 because there are 3 girls to 16.89.

4 0

3 years ago

The mass of an empty container is 3/10kg. When the container is half filled with water, the mass becomes 1 1/10kg. What is the m

Nastasia [14]

Answer:

1.9 kg

Step-by-step explanation:

Empty container: 3/10 kg = 0.3 kg

Container half filled: 1 1/10 kg = 1.1 kg

Mass of water that fills it halfway: 1.1 kg - 0.3 kg = 0.8 kg

Mass of water that fills it completely: 2 * 0.8 kg = 1.6 kg

Mass of container completely filled with water: 0.3 kg + 1.6 kg = 1.9 kg

6 0

3 years ago

If your correct i will give u brainlist=)

morpeh [17]

Answer:

point m' translated down 6 units

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

What Is The Answer? I also don't Understand this

Elodia [21]

We need to simplify this number. We begin by evaluating the numbers inside the equation. We can simplify this to:

$(2 \sqrt{k})^{-2}$

Now, we evaluate this one step further. Because a negative exponent makes the number 1 over what it was, we can make this problem:

$\frac{1}{(2 \sqrt{k})^{2} }$

This becomes:

$\frac{1}{(2 \sqrt{k})(2 \sqrt{k} ) } --\ \textgreater \ \frac{1}{4k}$

So, 1/4k is the answer. This is the same as C, so C is the right answer.

4 0

3 years ago

Given that <br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B8-3%5Csqrt%7B2%7D%20%7D%7B2%7D%20%3D%20a%2Bb%5Csqrt%7B2%7D" id="TexF

bearhunter [10]

Answer:

a = 4, b = - $\frac{3}{2}$