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Sati [7]
3 years ago
8

If sqrt x=-7 then x=-49true or false

Mathematics
1 answer:
natali 33 [55]3 years ago
5 0

False.


IF √x = -7.


Square both sides


(√x)² = (-7)²


x = (-7)(-7)


x = 49


x will equal 49


False is your answer



hope this helps

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Suppose your class sells gift wrap for $4/pack and greeting cards for $10/pack. Your class sells 205 packages in all and receive
Artemon [7]

Answer: 161 packages of gift wrap and the 44 packages of greeting cards

Step-by-step explanation:

We are told the class sells 205 packages in total of gift wraps and greting cards:

205=x+y (1)

Where x is the number of packages of gift wrap and y is the number of packages of greeting cards.

In addition, we are told the class receives a total of \$1084 selling each package of gift wrap for \$4 and each package of greeting cards for \$10:

1084=4x+10y (2)

Isolating x from (1):

x=205-y (3)

Substituting (3) in (2):

1084=4(205-y)+10y (4)

Finding y:

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3 years ago
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19. James has a desk job and would like to become more fit, so he purchases a
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Step-by-step explanation:

Solution

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The confidence level = 95

The Significance level= α = (100- 95)% = 0.05

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