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Hatshy [7]
3 years ago
9

Find the square root of 7-2√5​

Mathematics
2 answers:
pickupchik [31]3 years ago
7 0

Answer:√5 - √2

Step-by-step explanation:

= √(5 + 2 - 2√10 )

= √{(√5)² +(√2)² - 2.√5.√2}

= √(√5 - √2)² (by identity a² + b² -2ab = ( a-b)²)

= √5 - √2

san4es73 [151]3 years ago
4 0

5√5 = 11.8033989 or -2√5+7

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2. 10x - 11 - 4x = 43
Nezavi [6.7K]

Answer:

x=9

Step-by-step explanation:

10x - 11 -4x = 43

6x -11 =43

6x = 54

x=9

8 0
4 years ago
Stan's lawn mower had ⅛ of a gallon of gasoline in the tank. Stand started mowing and used all of the gasoline. He put 6/10 of a
KATRIN_1 [288]

Answer:Stan used 19/40 of a gallon of gasoline.

Step-by-step explanation:

At first, Stan's lawn mower had 1/8 of a gallon of gasoline in the tank. When it got finished, he put 6/10 of a gallon of gasoline in the tank. It means that the number of gallons of gasoline that he has already put in the tank is

1/8 + 6/10 = 29/40 of a gallon.

After he mowed, 1/4 of a gallon was left in the tank. Therefore, the total amount of gasoline Stan used is

29/40 - 1/4 = 19/40 of a gallon

8 0
3 years ago
Turn and Talk How are solving 2x + 4 = 20 and 2x - 4 = 20 alike? How are they different?​
hjlf

Answer:

they are both alike because you're dividing both equations by 2 . in both equations you're trying to get the variable by itself .

they are both different because both of the equations have a different x= . in equation 1 you subtract and in equation 2 you would add .

Step-by-step explanation:

For 2x+4=20 you would make +4 negative 4 to get the variable by itself .

then you'd subtract the numbers 20-4=16

then divide both sides by 2 2÷2 and 16÷2

x=8 is your answer

for 2x-4=20 you would make -4 and make it positive 4 to get the variable by itself

then you'd add the numbers 20+4

then divide both sides by 2 2÷2 and 24÷2

x=12

4 0
3 years ago
Zack has a old car. He wants to sell it for 60% off the current price. The market price is $500. How much money would he receive
Snowcat [4.5K]
Zack would receive $200. You have to make 60% as a decimal= 0.60 then multiply $500*0.60= $300 then you subtract $500-$300=$200
(Hope this works!!)
6 0
3 years ago
Why isn’t -3 a whole number? please answer asap
Musya8 [376]

Answer:

-3 is not a whole number because the whole number is like a zero , no fraction or demical part and <u>no negative</u>

<em>Hope</em><em> this</em><em> helps</em><em> </em><em>:</em><em>)</em>

Step-by-step explanation:

-3 has negative sign so it's not a whole number

5 0
3 years ago
Read 2 more answers
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