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-Dominant- [34]
3 years ago
10

A block of gold with a mass of 3864 kilograms has a volume of 0.2 cubic meters. What is the density of gold?

Mathematics
1 answer:
kaheart [24]3 years ago
3 0
The density of the gold is 772.8 kilograms\cubic meters
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Chase has 3 gallons of a solution that is 30% antifeeze that he wants to use to winterize his car. How much pure antifreeze shou
makvit [3.9K]

Let  x gallons be the amount of pure antifreeze that should be added to the 30% solution to produce a solution that is 65% antifreeze. Then the total amount of antifreeze solution will be x+3 gallons.

There are 30% of pure antifreeze in 3 gallons of solution, then

3 gallons - 100%,

a gallons - 30%,

where a gallons is the amount of pure antifreeze in given solution.

Mathematically,

\dfrac{3}{a}=\dfrac{100}{30},\\ \\a=\dfrac{3\cdot 30}{100}=0.9\ gallons.

Now in new solution there will be x+0.9 gallons of pure antefreeze.

x+3 gallons - 100%,

x+0.9 - 65%

or

\dfrac{x+3}{x+0.9}=\dfrac{100}{65},\\ \\65(x+3)=100(x+0.9),\\ \\65x+195=100x+90,\\ \\35x=105,\\ \\x=3\ gallons.

Answer: he should add 3 gallons of pure antifreeze.

8 0
3 years ago
NEED ANSWER! The cost of renting a car is $26.50 plus $10 pe rday. sales tax is 6% select the two expression that represent the
OLga [1]

Answer:

E.1.06(26.50+10d)

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4 0
2 years ago
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Order of operations what should be done first to evaluate 6+ (-5-7) ÷ 2 -8(3)
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Step-by-step explanation:

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ziro4ka [17]

Answer:

38 quarters

Step-by-step explanation:

0.25 x 63 = 15.75

0.05 x 63 = 3.15

----------------------------

0.25 x 50 = 12.50

                    +         = $13.15

0.05 x 13 = 0.65

----------------------------

0.25 x 25 = 6.25

                   +        = $8.15

0.05 x 38 = 1.90

----------------------------

0.25 x 30 = 7.50

                   +         = $9.15

0.05 x 33 = 1.65

--------------------------

0.25 x 35 = 8.75

                   +        = $10.15

0.05 x 28 = 1.40

-------------------------

0.25 x 38 = 9.50

                   +        = $10.75

0.05 x 25 = 1.25

------------------------------

I hope this helps!

4 0
2 years ago
Which statement is not true? Help ASAP! Thanks!!
omeli [17]

Answer:

4 option...... .......

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3 years ago
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