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2 years ago

I need help plzzzzzzzzzz

Mathematics

1 answer:

Artist 52 [7]2 years ago

8 0

Answer:1014

Step-by-step explanation:

1014 I think this because 2029 is 1014.5 and they can’t have half a marble so they rack get about 1014

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A number is multiplied by 2,and tgen the product is added to 9. Tge result is 49.Whatvus tye number

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Answer:

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is this the number 20?

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2 years ago

I need answer pls, PLS

Dafna1 [17]

Answer:

The answer is 17

Step-by-step explanation:

First step is dividing 45÷9 = 5

Then, 2² = 4

Now you have: 4 × 5 - 3 => 20 - 3 => 17

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2 years ago

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How many times does 6 go into 29

Anastasy [175]

Answer:

4 times

Step-by-step explanation:

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Which property is shown by 9+8=8+9?

Blababa [14]

Answer:

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2 years ago

The square of a number decreased by 3 times the number 28 find all possible values for the number

stealth61 [152]

Question:

The square of a number decreased by 3 times the number is 28 find all possible values for the number

Answer:

The possible values of number are 7 and -4

Solution:

Given that the square of a number decreased by 3 times the number is 28

To find: all possible values of number

Let "a" be the unknown number

From given information,

square of a number decreased by 3 times the number = 28

$a^2 - 3a = 28$

$a^2 - 3a - 28 = 0$

Let us solve the above quadratic equation

$\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0$

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Using the above formula,

$\text { For } a^{2}-3 a-28=0 \text { we have } a=1, b=-3, c=-28$

$\begin{aligned}&a=\frac{-(-3) \pm \sqrt{(-3)^{2}-4(1)(-28)}}{2 \times 1}\\\\&a=\frac{3 \pm \sqrt{9+112}}{2}\\\\&a=\frac{3 \pm \sqrt{121}}{2}=\frac{3 \pm 11}{2}\\\\&a=\frac{3+11}{2} \text { or } a=\frac{3-11}{2}\\\\&a=7 \text { or } a=-4\end{aligned}$

Thus the possible values of number are 7 and -4

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2 years ago