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3 years ago

Work out the value of 2x2 x-1=2

Mathematics

2 answers:

Otrada [13]3 years ago

6 0

Answer:

rong answer is 18

I think the right answer is 0.75

Step-by-step explanation:

mezya [45]3 years ago

6 0

Step-by-step explanation:

2x2 x-1 = 2

4x-1=2

4x=2+1

4x=3

X=3/4

Checking as x=3/4

2x2x3/4-1

4x3/4 - 1

12/3 - 1

Equalise the denominators

12-4/4

8/4=2

So 3/4 is correct

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What is -24 divided by 7 as a mixed number, in simplified form

elena55 [62]

-7 * 3 = -21 so the answer is

-3 3/7

3 0

2 years ago

Solve this equation for x: x^2+11x+28=0

lord [1]

Answer: x = -7 or x = -4

Step-by-step explanation: When an equation has a squared term in it

such as x² + 11x + 28 = 0, it's called a polynomial equation.

The rule for solving a polynomial equation

is to first set it equal to zero, then factor.

Since this equation is already set equal to zero,

our first step is to factor the left side of the equation.

To factor x² + 11x + 28, we need the factors

of 28 that add to 11 which are 7 and 4.

So we have (x + 7)(x + 4) = 0.

Whenever two terms are multiplied together to equal zero,

this means that either one or the other must equal zero.

So if (x + 7)(x + 4) = 0, then either x + 7 = 0 or x + 4 = 0.

Solving each equation from here, we get x = -7 or x = -4.

So our solution is {-7, -4}.

6 0

3 years ago

Anwser for brainlist

Mashutka [201]

Answer: 4y-3

is the answer

4 0

3 years ago

Read 2 more answers

Please help ASAP! Thanks! For the figures below, assume they are made of semicircles, quarter circles and squares. For each shap

bazaltina [42]

Answer:

Part 1) $A=36(\pi-2)\ cm^2$

Part 2) $P=6(\pi+2\sqrt{2})\ cm$

Step-by-step explanation:

Part 1) Find the area

we know that

The area of the shape is equal to the area of a quarter of circle minus the area of an isosceles right triangle

$A=\frac{1}{4}\pi r^{2}-\frac{1}{2}(b)(h)$

we have that the base and the height of triangle is equal to the radius of the circle

$r=12\ cm\\b=12\ cm\\h=12\ cm$

substitute

$A=\frac{1}{4}\pi (12)^{2}-\frac{1}{2}(12)(12)$

$A=(36\pi-72)\ cm^2$

simplify

Factor 36

$A=36(\pi-2)\ cm^2$

Part 2) Find the perimeter

The perimeter of the figure is equal to the circumference of a quarter of circle plus the hypotenuse of the right triangle

<em>The circumference of a quarter of circle is equal to</em>

$C=\frac{1}{4}(2\pi r)=\frac{1}{2}\pi r$

substitute the given values

$C=\frac{1}{2}\pi (12)$

$C=6\pi\ cm$

The hypotenuse of right triangle is equal to (applying the Pythagorean Theorem)

$AC=\sqrt{12^2+12^2}$

$AC=\sqrt{288}\ cm$

simplify

$AC=12\sqrt{2}\ cm$

Find the perimeter

$P=(6\pi+12\sqrt{2})\ cm$

simplify

Factor 6

$P=6(\pi+2\sqrt{2})\ cm$

6 0

3 years ago

Ryan gained $10 on a stock in the stock market. How is his profit expressed as a rational number?

BabaBlast [244]

Sorry if im wrong it might be 24

5 0

3 years ago