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MAVERICK [17]
3 years ago
12

I don’t know how to do this

Mathematics
1 answer:
Jet001 [13]3 years ago
6 0

Use proportions because we know that the triangles are similar.

\frac{20}{28}=\frac{5}{x}

Cross multiply.

20x=28×5

x=7

answer: 7

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Is 6 3/5 greater than 1 1/3 or least than
Aliun [14]

Answer:

6 3/5 is greater then 1 1/3

Step-by-step explanation:

Ok sooo 6 is greater the 1 so yeah.

4 0
3 years ago
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Ierofanga [76]

Answer:

2

Step-by-step explanation:

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8 0
3 years ago
The weight of Jane and Jessica was in the ratio of 8 : 9. Jane gained 2 kg while Jessica lost 4 kg. They then had the same weigh
postnew [5]

Answer:

  48 kg

Step-by-step explanation:

The given relations can be used to write a system of equations for the two weights. Those can be solved to find Jane's weight.

__

<h3>setup</h3>

Let x and y represent Jane's and Jessica's original weight, respectively. The ratio of weights was ...

  x/y = 8/9

After the changes in weight, they were equal:

  x+2 = y-4

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<h3>solution</h3>

Adding 4 to the second equation, we have an expression for y that can be substituted into the first equation.

  y = x +6 . . . . . . . . . . solve the second equation for y

  x/(x+6) = 8/9 . . . . . . substitute for y in the first equation

  9x = 8(x +6) . . . . . . . multiply by 9(x+6)

  x = 48 . . . . . . . . . . . simplify and subtract 8x

Jane weighed 48 kg at first.

_____

<em>Alternate solution</em>

The original difference in "ratio units" was 9-8 = 1 ratio unit. We find that this corresponds to 6 kg after the weight changes make the weights equal. Then 8 ratio units will be 8(6 kg) = 48 kg—Jane's original weight.

(This mental solution is virtually the same as the solution using equations shown above.)

3 0
2 years ago
jordan go's to the bank every 7 days and then Clare go's to the bank every day will bolth go to the bank
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Answer:

on the seventh day

Step-by-step explanation:

hope this helps

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3 years ago
Suponha que uma variável assume os valores: 11 – 8 – 7 – a – 16 – 10 Determine a de modo que a média aritmética seja igual 11.
Elenna [48]

Answer:

a = 14  

Step-by-step explanation:

The mean is the sum of the values divided by the number of values.

\begin{array}{rcl}\text{Mean}&= &\dfrac{11 + 8 + 7 + a + 16 + 10}{6}\\\\\dfrac{52 + a}{6}& = & 11\\52 + a & = & 66\\a & = & 66 - 52\\& = & \mathbf{14}\\\end{array}

4 0
3 years ago
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