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galina1969 [7]
3 years ago
14

A girl is twice as old as her brother and half as old as her dad. in 22 years, her brother will be half as old as his father. ho

w old is the daughter now?
Mathematics
1 answer:
Stolb23 [73]3 years ago
4 0
Let x be the age of the brother, then:

Now:
x = brother
2x = sister
4x = father

In 22 years:
(x+22) = brother
(4x+22) = father

4x+22 = 2(x+22)
4x+22 = 2x + 44
4x-2x = 44 - 22
2x = 22
x = 11 years old (brother now)

11*2=22 years old (sister now).
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The lengths of the sides of a triangle or an extended ratio 7 8 and 9 the perimeter of the triangle is 48 cm what are the length
julsineya [31]

Answer:

14cm, 16 cm, 18 cm

Step-by-step explanation:

Note that

= a:b: c = 7:8:9

We have to find the sum of the proportion

Sum of proportion = 7 + 8 + 9

= 24

Length of side a

7/24 × 48 = 14 cm

Length of side b

8 /24 × 48 = 16cm

Length of side a

9/24 × 48 = 18 cm

What are the lengths of the sides?

The lengths of the sides of the triangle in cm are

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4 0
2 years ago
Please help me on this problem. ​
Len [333]

Answer:

Step-by-step explanation:

Problem 4a

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The total number of results is

6 * 4 * 3 = 72

Problem 4b

P(A,3,Q) = (1/3)(1/6)(1/4) = 1/72

Problem 4c

A and Q remain the same. 1/3 and 1/4

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So the results are 1/3 * 1/4 * 5/6 = 5/72

4 0
3 years ago
If h(x)=6-x, what is the value of (h•h) (10)?
butalik [34]

Answer:

16

Step-by-step explanation:

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h.h = (6 - x)²

h.h = x² - 12x + 36

h.h(10) = 10² - 12(10) + 36 = 16

8 0
3 years ago
HELP PLEASE. 20 POINTS
DIA [1.3K]

Answer:

(x,y) to (2x,2y) and (x,y) to (x+2,y+2)

Step-by-step explanation:

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5 0
3 years ago
104, 137, 154, 131, x; mean = 130
pochemuha
<span>(104+ 137+ 154 +131+x )/5= 130
526 + x = 650
          x = 650 - 526
          x = 124
          </span>
7 0
3 years ago
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