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White raven [17]
3 years ago
8

Set up an equation and solve for the unknown number.

Mathematics
1 answer:
Luda [366]3 years ago
8 0
Let x be the unknown number.

4+x=2x
4=2x-x
x=4
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What volume in liters would be occupied by 21753mg of a material with density of 1.935 g/mL
REY [17]

Answer:

0.0112 liters to the nearest ten thousandth.

Step-by-step explanation:

Density = mass / volume

So volume = mass / density.

Mass = 21753 mg = 21753 / 1000 = 21.753 g.

Density = 1.935 g/mL = 1.935 * 1000 = 1,935 g/L.

Volume in liters =  21.753 / 1,935

= 0.0112 liters to the nearest ten thousandth.

3 0
3 years ago
A wildlife preservation group records the number of squirrels in a city park. The first count recorded is 30 squirrels. A second
ipn [44]

Answer:

A F(x)=30x

Step-by-step explanation:

just plug number in to the equations to see which one matches

5 0
4 years ago
Read 2 more answers
Saleem has $20. A fish tank that he wants to buy costs $140. He earns $23 per day at a restaurant. Saleem wants to know how many
mr_godi [17]

Answer:

Since he can't work a fraction of a day, he'll have to work at least 6 days to have enough money for the tank. The inequality hat represents his situation is 23*x + 20 >=140.

Step-by-step explanation:

In order to create an inequality to this problem we first need to take the initial amount he has and sum it with the days he has to work "x" multiplied by the amount he earns each day. We then have:

saleem money = 20 + 23*x

Since he wants to buy a $140 fish tank he needs to work until his money is greater or equal than this amount. So we have:

23*x + 20 >= 140

23*x >= 140 -20

23*x >= 120

x >= 120/23

x >= 5.22

Since he can't work a fraction of a day, he'll have to work at least 6 days to have enough money for the tank. The inequality hat represents his situation is 23*x + 20 >=140.

3 0
3 years ago
Prove that if b is a square matrix then b+b^t is symmetric
WARRIOR [948]
A matrix \mathbf X is symmetric if \mathbf X=\mathbf X^\top. We have

(\mathbf B+\mathbf B^\top)^\top=\mathbf B^\top+(\mathbf B^\top)^\top=\mathbf B^\top+\mathbf B=\mathbf B+\mathbf B^\top

and so \mathbf B+\mathbf B^\top is indeed symmetric.
6 0
4 years ago
Which is closest to the quotient 4,367÷0.004 ?
Ainat [17]

Answer: A

Step-by-step explanation: 4,367÷0.004= 1,091,750

3 0
3 years ago
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