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Vladimir [108]
3 years ago
11

Solve the equation by completing the square. (step by step please)4x(x + 6) = -40​​

Mathematics
1 answer:
LuckyWell [14K]3 years ago
5 0

Answer:

4(x+3)²+4

Step-by-step explanation:

4x²+24x+40=0

using the equation above

a:4 b:24 c:40

4(x+(24÷2x4))² + (40-(24²÷4x4))

4(x+3)²+(40-36)

4(x+3)²+4

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What's 13/20 converted into a decimal
vivado [14]
.65 

13/20
Just simply divide and you get .65
6 0
3 years ago
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1350 + 100 - 399 ......
adell [148]

Answer:

1,051

Step-by-step explanation:

  1. 1350 + 100 = 1450
  2. 1450 - 399 = 1051

I hope this helps!

6 0
3 years ago
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Prove that the value of the expression : 38^9–38^8 is divisible by 37
xenn [34]

38^9-38^8 =38^8(38-1)=38^8\cdot37

6 0
4 years ago
The figure below shows square ABCD inscribed on square PQRM on a coordinate plane. Which of the following expressions represents
vova2212 [387]
The hypotenuse of the triangle is given by:
 CB ^ 2 = RC ^ 2 + RB ^ 2

 Substituting values:
 CB ^ 2 = 2 ^ 2 + 4 ^ 2

 Clearing CB we have:
 CB = \sqrt{ 2 ^ 2 + 4 ^ 2}  

 CB = \sqrt{ 4 + 16}  

 CB = \sqrt{20}  

 CB = \sqrt{4*5}  

 CB = 2\sqrt{5}  




 Then, the perimeter of the triangle is:
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 Substituting values:
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 P = 6 + 2 \sqrt{5}
 Answer:
 the perimeter of triangle BRC in units is:
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7 0
3 years ago
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Adam and beth each drove from smallville to crown city by different routes. adam drove an an average speed of 40 miles per hour
Anna71 [15]

Adam's average speed = 40 miles per hr

time for the trip = 30 minutes = 0.5 hrs

Distance travelled by adam = speed * time = 40 * 0.5 = 20 miles

Distance travelled by Beth is 5 miles longer means 20 + 5 = 25 miles

Time took by Beth is 20 minutes more means = 30 + 20 = 50 minutes = 0.83 hrs

Average speed of Beth = distance / time = 25 / 0.8333

Average speed of Beth = 30 miles : Answer

Hope it will help :)

6 0
4 years ago
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