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3 years ago

Solve the equation by completing the square. X^2 + 4x =45

Mathematics

1 answer:

Nina [5.8K]3 years ago

4 0

Answer:

The answer is x=5, −9

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33. The students of Class VIII of a school donated Rs 2401 in all, for Prime Minister's National

DaniilM [7]

Answer:

Step-by-step explanation:

Let there be x students in the class.

Since, donation by each student is equal to the number of students in the class.

So,

Total donations = 2401

$x \times x = 2401 \\ \\ {x}^{2} = 2401 \\ \\ x = \pm \sqrt{2401} \\ \\ \pm \: 49 \\ \\ \because \: x \: can \: not \: be \: - ve. \\ \\ \therefore \: x = 49$

Thus, the number of students in the class = 49

7 0

3 years ago

Solve tor r.<br> *a(5 – x) = bz - 8

Mars2501 [29]

Answer:

See explanation

Step-by-step explanation:

Assuming the given equation is

$a(5 - r) = bz - 8$

To solve for r, we first divide both sides by a.

$5 - r = \frac{ bz - 8}{a}$

We now subtract 5 from both sides:

$- r = \frac{ bz - 8}{a} - 5$

We now divide through by - 1 to get:

$r = 5 - \frac{ bz - 8}{a}$

$r = \frac{5a - bz + 8}{a} \: \: where \: a \ne0$

3 0

3 years ago

Which decimal is between 1.5 and 1.7

Pavel [41]

1.6 is in between those 2 numbers

7 0

4 years ago

Read 2 more answers

Triangle - Find Value of X

ira [324]

Answer:

This is an isosceles triangle. You should know that in an isosceles triangle, 2 sides are the same if the opposite side lengths are the same. So 4x-2=62. Then add 2 to both sides to get 4x=64, and finally divide by 4 to get the answer of 16. x=16

4 0

4 years ago

I need to know 6 50/6 converted to fraction and simpilied

FromTheMoon [43]

$6\frac{50}{6} =6\frac{25}{3}=14\frac{1}{3} =\frac{43}{3}$

Hope this helped

7 0

3 years ago