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Yakvenalex [24]
3 years ago
10

Julie is x years old. Kevin is x+3 years old & Omar is 2x years old. Write an expression , in terms of x , for the mean of t

heir ages.
Mathematics
1 answer:
Umnica [9.8K]3 years ago
7 0

Answer:

(x+x+3+2x)/3 = (4x+3)/3

Step-by-step explanation:

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The base of a triangle is nine centimeters longer than the perpendicular height. If the area of the triangle is 180 square centi
Rom4ik [11]

Answer:

<em>The base is 24 cm long.</em>

Step-by-step explanation:

<u>Equations</u>

Let's call

b= base of the triangle

h=height of the triangle

The base is 9 cm longer than the height, thus:

b = h + 9

The area of the triangle is:

\displaystyle A=\frac{bh}{2}

\displaystyle A=\frac{(h+9)h}{2}

And its value is 180:

\displaystyle \frac{(h+9)h}{2}=180

Multiplying by 2:

(h+9)h=360

Operating:

h^2+9h-360=0

Factoring:

(h-15)(h+24)=0

The only valid positive solution is:

h = 15 cm

And b = h + 9 = 24

b = 24 cm

The base is 24 cm long.

7 0
3 years ago
On Saturday a library checked out 52 books.if 24 of the books were fiction what is the ratio of nonfiction books to fiction book
alukav5142 [94]
52-24=28 books were nonfiction
You must get the ratio if nonfiction to fiction
28/24= 7/6
5 0
3 years ago
160% of what number is 19.2
riadik2000 [5.3K]

Answer:

The number is 12

Step-by-step explanation:

Let x be the number

160/100 = 1.6

1.6 x = 19.2

x = 19.2 / 1.6

x = 12

7 0
3 years ago
Find the length of the segment QS.(Enter the just the value, without any units.)
motikmotik

Answer:

QS = 15

Step-by-step explanation:

Thales

QS/QT = RS/PT

QS = QT·RS/PT

= 20×12/16

= 240/16

= 15

3 0
3 years ago
Read 2 more answers
Gavin invests $5,000 in a savings account that pays 3.75% simple interest. How much will be in the account after 6 years if Gavi
ivolga24 [154]

Answer:

$6261.62

Step-by-step explanation:

A=Pe^rt forumla

A=5000e^0.0375(6)=6261.612633

I rounded e to 2.71828 for calculator reasons

and I rounded the number two places since it is a monetary value.

I tried hope it helps!!!

8 0
3 years ago
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