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Nina [5.8K]
3 years ago
13

Banana + banana = 30

Mathematics
1 answer:
Alina [70]3 years ago
7 0
2banana=30
÷2 both sides

banana=15

4cherry=20
÷4 both sides

cherry=5

2apple=8
÷2 both sides

apple=4

15+5+4=
20+4=24
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You are making 10 tons of concrete that is 37.9% cement by mixing a 25% cement mixture with a 68% cement mixture.
Mnenie [13.5K]
The 10 tons should have 37.9% cement.

Let the 25% mixture be x tons

Then the 68% mixture will be (10 -x) tons.

Using formula for mixtures:
Let p for percentage and w for weight in tons.

p₁w₁ + p₂w₂ = pw

25*x + 68*(10-x) = 37.9*10

25x + 680 - 68x = 379

680 - 43x = 379

680 - 379 = 43x

301 = 43x

43x = 301

x = 301/43

x = 7

Recall that x, was for the 25% mixture, 7 tons.

a) For the 68% mixture, = 10 - x = 10 -7 = 3 tons.

b) For the 25% mixture = x = 7 tons.  
6 0
3 years ago
A package of modeling clay was shaped like a cone with a radius of 24 cm and a height of 6 cm. Miriam used all the clay to make
Darina [25.2K]
Given:
Cone shape: radius = 24 cm ; height = 6cm
Cylinder: radius = 16cm

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Volume of a cone = π r² h/3 = 3.14 * 24² * 6/3 = 3.14 * 576 * 2 = 3,617.28

Volume of a cylinder = π r² h
3,617.28 = 3.14 * 16² * h
3,617.28 = 3.14 * 256 * h
3,617.28 = 803.84 h
3,617.28 / 803.84 = 803.84h/803.84 
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The height of the cylinder is 4.5cm
7 0
3 years ago
All the numbers between 20 and 40 which are multiples of 2 and 3
nydimaria [60]

Answer:

21, 24, 27, 30, 33, 36, 39.

Step-by-step explanation:

7 0
3 years ago
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An eraser is in the shape of a triangular prism. Its dimensions are shown in the diagram. What is surface area of the
Colt1911 [192]

Answer:

6000 square millimeters

Step-by-step explanation:

Side length of the slanting side can be calculated using the Pythagorean theorem,

L = sqrt(30^2+40^2) = 50

sufrace area of a triangular prism

= surface area of the end sections + the surface area of the three side faces

= 2*(30*40/2) + 40*(30+40+50)

= 1200 + 4800

= 6000 mm^2

4 0
3 years ago
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If x = 2y = 3 <br>find xy-y+ x × x ​
olga_2 [115]

Answer:

here ....x = 2 and y = 3

= xy - y + x \times x

= 2 \times 3 - 3 + 2 + 2 \times 2

= 6 - 3 + 2 + 4

= 12 - 3

= 9

4 0
2 years ago
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