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3 years ago

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Luis bought two pieces of wax to make candles. One piece weighed 3.49 kg, and the other weighed 4.71 kg. If wax costs $1.80 per

kg, how much did Luis spend altogether?

1 answer:

EleoNora [17]3 years ago

8 0

(3.49+4.71)1.80=cost

(8.2)1.80=cost

14.76=cost

Luis spends $14.76 all together

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Oliver works at a book store.He packed 20 identical paperbacks and 9 identical textbooks in a box .The total mass of the book wa

Natasha_Volkova [10]

Let x be the mass of the paperbacks and y be the mass of the textbook.

20x + 9y = 44.4 ----------- (1)
25x + 10y = 51 -------------(2)

(1) x 10:
200x + 90y = 444 --------(1a)

(2) x 9:
225x + 90y = 459 --------(2a)

(2a) - (1a):
25x = 15
x = 0.6 -------- sub into (1)

20 (0.6) + 9y = 44.4
12 + 9y = 44.4
9y = 44.4 - 12
9y = 32.4
y = 3.6

So the paperback's mass is 0.6 pounds and textbook is 3.6 pounds

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4 years ago

Kyle buys a turtle tank for Tiny, his pet turtle. The tank is 16 inches tall. The base

lions [1.4K]

The volume of the Tiny's tank will be equal to V=7760 cubic inches.

<h3>What is volume?</h3>

Volume is defined as the space occupied by any object in the three-Dimensions. All three parameters are required for the volume like length, width and height of the cube and for the cone it will be radius and height.

It is given that:-

The tank is 16 inches tall.

The area of the tank is 485 square inches

So the volume of the tank will be:-

V= πr²h

V=Area x h

V= 485 x 16

V= 7760 cubic inches

Therefore the volume of the Tiny's tank will be equal to V=7760 cubic inches.

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brainly.com/question/1972490

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2 years ago

Read 2 more answers

The radius of a well is 1.4m and its depth 35 m is half-filled with water. find the volume of water inside the drum.

Rzqust [24]

Answer:

≈ 108 m³

Step-by-step explanation:

You're searching for the volume of a cylinder. The formula needed to find it is V=πr²h.

In this case, the radius r is 1.4m and the height h is 35/2=17.5m, as it is only half filled.

Now when inserting values, you get: V=π*1.4²*17.5 which is 107.757 m³

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3 years ago

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6. Juan recibe de su papá, quien tiene un negocio de maquinitas, su mesada semanal de $62.000 en monedas de $200,

Y_Kistochka [10]

Answer:

15100

Step-by-step explanation:

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3 years ago

If sin theta = -1/2 and lies in the third quadrant, what is the cos?

never [62]

Sin angle that equals the 1/2 value is the 30 degree on the 1st Quadrant.

The angle of 30 degree on the 3rd Quadrant is equivalent to (formula and circle in the 1st photo) 180 + 30 = 210°.

So theta = 210° (3rd Quadrant) = 30° (1st Quadrant).

$cos \: 30\degree = \sqrt{3} \div 2$

Now just transfer the cos 30° to the 3rd Quadrant and the signal will be negative (as shown in the 2nd photo attached).

$cos \: 210 \degree = - \sqrt{3} \div 2$

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4 years ago