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Zolol [24]
3 years ago
8

Which sequence has a common ratio of 2? a{20, 40, 80, 160, 320, 640, …} b{20, 10, 5, 2.5, 1.25, 0.625, …} c{20, 15, 10, 5, 0, -5

, …} d{20, 4, 0.80, 0.16, 0.032, 0.0064, …}
Mathematics
1 answer:
Elis [28]3 years ago
4 0

Answer:

A

Step-by-step explanation:

40/20=2

80/40=2

Therefore the common ration is 2

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Anne is painting her house light blue. To make the color she wants, she must add 3 cans of white paint to every 2 cans of blue p
GuDViN [60]

Answer:

9 cans of white paint

Step-by-step explanation:

To solve this you can set up a ratio.

The ratio right now is 3 : 2, you have 3 cans of white paint for every 2 cans of blue paint. This question is asking how many white paint cans would be needed for 6 cans of blue paint. You can see the relationship between the number of blue paint cans and the new number of blue paint cans, maybe it's multiplying by 4 or 2 for example, and once we find that out we can do the same exact thing to the white cans.

\frac{3}{2}  = \frac{?}{6}

We can see that to get from 2 to 6 you multiply by 3, so now we do that to the other side of the fraction as well, we multiply by 3. 3 multiplied by 3 is 9, so if we were to have 6 cans of blue paint we would need 9 cans of white paint to get that perfect shade of light blue. Anne would need 9 cans of white paint if she had 6 cans of blue paint to make her shade of blue.

6 0
3 years ago
The volume of a pyramid with a square base where the area of the base is 8.7m^2 and the height is 10
MrMuchimi

Answer:

  29 m³

Step-by-step explanation:

The applicable formula is ...

  V = (1/3)Bh

Assuming the height is 10 m, the volume is ...

  V = (1/3)(8.7 m²)(10 m) = 29 m³

_____

The shape of the base is irrelevant.

5 0
3 years ago
I need help please?!!!!!
Viefleur [7K]

Answer: 9x+3

Step-by-step explanation: 4x-(-3 - 5x)

                                            =4x+ 3 +5x   [open the bracket]

                                            =9x+3

7 0
3 years ago
The ratio of boys to girls in Mrs.Graingers class is 3 to 2. what is the % of the class are boys
marshall27 [118]
In plain and short, the whole class is 100%, so we first split it by the ratios, namely by 3+2, so 100/(3+2) and then give 3 pieces to the girls and 2 pieces to the boys, let's do so,

\bf \cfrac{girls}{boys}\qquad 3:2\qquad \cfrac{3}{2}\qquad \qquad \cfrac{3\cdot \frac{100}{3+2}}{2\cdot \frac{100}{3+2}}\implies \cfrac{3\cdot 20}{2\cdot 20}\implies \cfrac{60}{40}
3 0
3 years ago
A pair of jeans cost $44.00. If they are on sale 40% off, how much will you save?
anygoal [31]
You will save 17.60$. hope this helps!
4 0
3 years ago
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