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just olya [345]
3 years ago
5

Ralph sold brownies for $0.99 a piece in order to earn money for baseball cards. If the cards cost $1.35 per pack, and if Ralph

had no money left over after buying them, what is the least number of brownies he must have sold
Mathematics
1 answer:
elixir [45]3 years ago
3 0
Least common multiple of 0.99 and 1.35 
99 = 3 x 3 x 11
135 = 3 x 3 x 3 x 5

LCM = 3 x 3 x 3 x 5 x 11 = 1485.
Thus LCM of 0.99 and 1.35 = 14.85

Therefore, the least number of brownies he must have sold = 14.85/0.99 = 15.
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The diagram shows the cross-section of a wall of a cinema.
Anna71 [15]

Answer:

  • 280 m²
  • £133

Step-by-step explanation:

The area of the wall is the sum of the areas of the different sections of the wall. The cost to paint it will be the product of the cost of a tin of paint and the number of tins required.

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Here, the shape of the wall can be divided into two trapezoids and a rectangle. Each shape has a corresponding area formula. Left-to-right, their areas are ...

<u>Left Trapezoid</u>

  A = 1/2(b1 +b2)h

  A = 1/2(10 m +11 m)(4 m) = 42 m²

<u>Middle Rectangle</u>

  A = LW

  A = (13 m)(11 m) = 143 m²

<u>Right Trapezoid</u>

  A = 1/2(b1 +b2)h

  A = 1/2(11 m +8 m)(10 m) = 95 m²

<u>Wall Area</u>

The total area to be painted is the sum of the above areas:

  total area = 42 m² +143 m² +95 m² = 280 m²

The area that needs to be painted is 280 m².

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A tin of paint covers 15 m², so the number of tins needed is ...

  (15 m²)t = 280 m²

  t = 280/15 = 18 2/3 . . . . . . divide by the coefficient of t

We can only buy whole tins, so we need to buy 19 tins. Their cost will be ...

  (£7 /tin)(19 tins) = £133

It will cost £133 to paint the wall.

7 0
2 years ago
Graph the line that passes through the points (-4, -1) and (-4, 2) and determine the equation of the line.​
My name is Ann [436]

Answer:

X = -4

Step-by-step explanation:

7 0
3 years ago
If n is at least 7, which inequality best represents the values of n?
Wittaler [7]

Answer:

<em>The answer to your question is</em> <em>C.n ≥ 7</em>

Step-by-step explanation:

<u><em>I hope this helps and have a good day!</em></u>

3 0
1 year ago
Can you please show working out for $4,000 at 3% for 4 years
dedylja [7]
100\%+3\%=103\%\\\\p\%=\dfrac{p}{100}\to103\%=\dfrac{103}{100}=1.03\\\\\$4,000\cdot1.03^4=\$4,679.43
5 0
3 years ago
Question in the photo
melisa1 [442]

Answer:

14

Step-by-step explanation:

To make this not a function, the same input would need to go to two different outputs

so the input would need to be 5 ,17, or 14

3 0
3 years ago
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