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Gre4nikov [31]
2 years ago
11

The first three steps of completing the square to solve the quadratic equation 2? + 8x + 5 = 0 are shown

Mathematics
2 answers:
Kipish [7]2 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

take the square root of both sides

step 4 : x + 4 = ± \sqrt{11} ( subtract 4 from both sides )

step 5 : x = - 4 ± \sqrt{11}

step 6 : x = - 4 - \sqrt{11} , x = - 4 + \sqrt{11}

Firlakuza [10]2 years ago
4 0

Answer:

x = 3/2

Step-by-step explanation:

Step 4: 2x + 8 = 11

step 5: 2x +8 - 8 = 11 -8

step 6: 2x/2 = 3/2

step 7: <u>x = 3/2</u>

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A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n?
tekilochka [14]
Sum of two sides of the triangle should be more than 3d side.
n<20+5,
n<25

Third side should be more than difference of  two other sides.
n> 20-15
n>5

So, n should be
5<n<25.
6 0
3 years ago
Read 2 more answers
Ok I really need help
Nataly_w [17]

for a normal triangle its (bh)/2 but this is a right triangle so you multiply the two perpendicular sides and divide it by 2

8 0
3 years ago
John accepted a reduction of 15% on his salary when his company was not doing well. Now his company's financial position has imp
o-na [289]
To reverse a percentage decrease you divide it by the decrease (+ 100%)
For example we will pick the number, 100, which is decreased by 15% to 85.

To make 85 back to 100 we divide it by the decrease (1-0.15):
85 / 0.85 = 100

To find out how much 85 increased to get back to 100, we do:
15 / 85 = 0.1765 = %17.65

15 is the reduction/difference, and 85 is the with reduction total.

Because percentages stay the same, this is applicable to any numbers, from this, we know that whenever something is reduced by 15% - when restored to it's original is increased by %17.65

The answer is %17.65


6 0
3 years ago
Can someone help me please
Yakvenalex [24]

Answer:

the third one ( -7+u+8t)

Step-by-step explanation:

first you add the ts together and you get 8. Then u keep the U and cancel out the +2 nad the -2. Then you are left with your answer. have a nice day

7 0
3 years ago
I need help !!!!!!!!!!!!!!! For 1 and 2
11Alexandr11 [23.1K]

Answer:

#1: 5

#2: \sqrt{40}

Step-by-step explanation:

Inverse of Pythagorean Theorem:  c²-b²=a²

c²   b²      a²

13²- 12² = 25

\sqrt{25} = 5

Pythagorean Theorem: a²+b²=c²

a²    b²     c²

2² + 6² = 40

c = \sqrt{40}

5 0
3 years ago
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