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Sergeu [11.5K]
2 years ago
11

What is the value of x

Mathematics
1 answer:
zzz [600]2 years ago
8 0

Answer:

x = 5

Step-by-step explanation:

Δ EAB and Δ EDC are similar by the AA postulate , so the ratio of corresponding sides are in proportion , that is

\frac{AB}{DC} = \frac{EA}{ED} , substitute values

\frac{10}{4} = \frac{2x+10}{x+3} ( cross- multiply )

10(x + 3) = 4(2x + 10 ) ← distribute parenthesis on both sides

10x + 30 = 8x + 40 ( subtract 8x from both sides )

2x + 30 = 40 ( subtract 30 from both sides )

2x = 10 ( divide both sides by 2 )

x = 5

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If the area of a square is 100cm2, then what is its perimeter?
Vinil7 [7]

Answer:

40cm

Step-by-step explanation:

A=s*s

A=10*10

A=100 cm^2

P=4*s

P=4*10

P=40 cm

"s" represents side

6 0
3 years ago
Jeff writes comic strips for local newspaper. The number of comic strips he created is represented by the function f(x)=3x, wher
grin007 [14]
If Jeff writes comic strips at a rate of 3 comics an hour then you must put 3,4,7&9 into the function and add up the products.
9+12+21+27=69
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3 years ago
What is (a+2)(a+2) make sure to multiply
a_sh-v [17]

Answer:

a² + 4 a + 4

Step-by-step explanation:

( a + 2 ) ( a + 2 )

Expand brackets

a² + 2 a + 2 a + 4

Simplify

a² + 4 a + 4

7 0
2 years ago
Read 2 more answers
[NO WRONG ANSWERS!!!]<br><br> What is the sum of the following equation?<br><br> 89x+5y+1x+5y
mixas84 [53]

Answer:

90x+10y

Step-by-step explanation:

Add 89 and 1

Add 5 and 5

90x+10y in this order

3 0
3 years ago
Read 2 more answers
I do not even know where to begin. Please help.
xenn [34]
F(x) = 2x + 1  when x <= -5
Now -10 is less than -5 so we plug x = -10 into 2x +1:-

f(-10) = 2(-10) + 1 =  -19 answer

Now f(x) = x^2 when  -5< x < 5
x =2  is within this range so f(2) = 2^2 = 4 answer

You can calculate the  other 3  values by a similar method
5 0
2 years ago
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