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4 years ago

Select whether the equation has a solution or not. √x = 7

Mathematics

1 answer:

Ierofanga [76]4 years ago

6 0

Answer:

x = 49

The equation does have a solution

Step-by-step explanation:

The sqrt of x = 7, does have a solution. Simply remove the radical, and raise each side by the index of the radical.

In more basic terms, what number has the sqrt of 7? 7^2 is equal to 49!

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The bike store marks up the wholesale cost of all of the bikes they sell by 30%. If the bike is discounted by 20%, how much will

klio [65]

Answer:

$100

Step-by-step explanation:

7 0

3 years ago

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WILL GIVE BRAINLIEST but you have to show your work

Allushta [10]

Answer:

x=-3

Step-by-step explanation:

$\sqrt{x+7}-x=5\\\sqrt{x+7}=5+x\\x+7=x^2+10x+25\\x^2+9x-18=0\\(x+3)(x+6)=0\\x=-3, x=-6\\\sqrt{-3+7}-(-3)=5\\\sqrt{-6+7}-(-6)=7=5$

x=-6 is extraneous because 7 does not equal to 5

x=-3 is the answer because 5=5

4 0

3 years ago

2x+3y=10<br> -6x-9y=30<br> elmantation method

Assoli18 [71]

Answer:

• First assign any label to the equations:

${ \tt{2x + 3y = 10 - - - \{eqution \: (a) \}}} \\ { \tt{ - 6x - 9y = 30 - - - \{equation \: (b) \}}} \\$

• Multiply equation (a) by 3

$\dashrightarrow \: { \tt{3 \times (2x + 3y = 10)}} \\ \dashrightarrow \: { \tt{6x + 9y = 30}}$

• Sum up the result with equation (b)

${ \underline{ + { \tt{ \binom{6x + 9y = 30}{ - 6x - 9y = 30} }}}} \\ { \tt{0x + 0y = 60}}$

Answers:

No solutions

5 0

2 years ago

I need help on this thank you

zaharov [31]

Answer:

B. lines BE and CG have to be parallel.

Step-by-step explanation:

5 0

3 years ago

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Evaluate<br><br> 4 / 5/6<br> Give your answer as a mixed number in its simplest form.

saul85 [17]

If we evaluation the expression 4 ÷ 5/6, the result is $4\frac{4}{5}$ .

<h3>How to evaluate an expression?</h3>

Given that;

4 ÷ 5/6
Evaluation = ?

4 ÷ 5/6

4/1 ÷ 5/6

First, we flip the numerator and denominator of the second fraction and changing the operation to multiplication

4/1 × 6/5

( 4 × 6 ) / ( 1 × 5 )

24 / 5

$4\frac{4}{5}$

Therefore, if we evaluation the expression 4 ÷ 5/6, the result is $4\frac{4}{5}$ .

Learn more about Algebra Problems here: brainly.com/question/723406

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7 0

2 years ago