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Alex777 [14]
3 years ago
12

An older person is 4 years older than 7 times the age of a younger person. The sum of their ages is 44. Find their ages

Mathematics
1 answer:
Fynjy0 [20]3 years ago
8 0

Answer:

5 yr and 39 yr

Step-by-step explanation:

Let x = the age of the younger

then 7x + 4 = the age of the older

Now x + 7x + 4 = 44

8x + 4 = 44

8x = 40

x = 5

7x + 4 = 7(5) + 4 =  35 + 4 = 39

Check:  5 + 39 = 44

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Steve puts an 18-foot ladder against his house. The ladder reaches a height of 15 feet on the house. How far is the bottom of th
krek1111 [17]

Answer:

3 \sqrt{11}

Step-by-step explanation:

Since we are given the hypotenuse which is 18 since it slanted, and leans on the house. And we are given one of the legs which is 15 since it is vertical. We can use the pythagorean theorem to solve for this problem.

{a}^{2}  +  {b}^{2}  = c {}^{2}

where a and b are the legs and c is the hypotenuse l.

Let plug it in

{a}^{2}  + 15 {}^{2}  =  {18}^{2}

{a }^{2}  + 225 = 324

{a}^{2}  = 99

a =  \sqrt{99}

a =  \sqrt{9 \times 11}

a = 3 \sqrt{11}

4 0
3 years ago
Which coordinate grid shows Point A at (0.50, −1.25)? (1 point)
polet [3.4K]

9514 1404 393

Answer:

  (d)  see below

Step-by-step explanation:

Since each grid square is 1/4 unit. the coordinates in terms of grid squares are ...

  A(0.50, -1.25) ⇒ (0.50/.25, -1.25/.25) = (2, -5) . . . grid squares

Point A is located 2 squares right and 5 squares down on the grid. This matches choice D.

5 0
3 years ago
Read 2 more answers
The volume of a cylinder is 770 cm. It's height is 5 cm. Find its approximate radius.
Alinara [238K]

Hey there,

The equation for the volume of a cylinder is V = πr²h.

The first step into finding the radius is to plug in what you already know into the equation:

  • 770 = πr²5

We divide both sides by 5:

  • 154 = πr²

Now we divide both sides by π:

  • 49.0197224723 = r²

Finally we just do the square root of 49.0197224723:

  • 7.0014086063 = r

The radius therefore would be about 7cm.

Hope I helped,

Amna

3 0
3 years ago
What is the value of A if sin A =
Alenkinab [10]

Answer:

idek

Step-by-step explanation:

idek

3 0
3 years ago
Line a passes through the points (-1,0) and (3,-8)<br> what’s the slope?
konstantin123 [22]

Answer: 2

Step-by-step explanation:

(x1,y1) = (-1,0)

(x2,y2) = (3,8)

m = (8–0)/(3-(-1))

m = 8/(3+1)

m = 8/4

m = 2

8 0
3 years ago
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