3 years ago

Are the ratios 2:1 aand 18:9 equivalent

Mathematics

1 answer:

Norma-Jean [14]3 years ago

4 0

First bring them to common denominator.

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Factor the following trinomial. (Hint: Solve the equations first.)<br><br> x²-2x-2

Alex_Xolod [135]

Answer:

$(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2} -2x-2=0$

$a=1\\b=-2\\c=-2$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(1)(-2)}} {2(1)}$

$x=\frac{2(+/-)\sqrt{12}} {2}$

$x=\frac{2(+/-)2\sqrt{3}} {2}$

$x_1=\frac{2(+)2\sqrt{3}} {2}=1+\sqrt{3}$

$x_2=\frac{2(-)2\sqrt{3}} {2}=1-\sqrt{3}$

therefore

$x^{2} -2x-2=(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

5 0

3 years ago

In a school,3/5 of the pupils were boys and there were 240 girls. How many boys were in the school.

zepelin [54]

Answer:

If 2/5 is 240 then 1/5 is 120..multiply 120 by 5 which is 600 so...

600=total

Then..multiply 120 by 3 which will give the 3/5 boys which is 360 so...

360 boys

Step-by-step explanation:

8 0

3 years ago

Will give brainliest

erastovalidia [21]

Answer:

Step-by-step explanation:

4 0

3 years ago

What is the equation in slope-intercept form of a line that passes through the point (4, 5) and has a slope of 12?

victus00 [196]

Answer:

y= 12x -43

Step-by-step explanation:

y-5 = 12(x-4)

y-5= 12x-48

+5 +5

y= 12x- 43

5 0

3 years ago

x is a point in the interior of rectangle PTRS. If XP=a, XT=c and XR=b, determine XS. a<b<c. Answer should be in terms of

White raven [17]

So you cannot really get the exact measure because they didn't give you any measures, but we can infer that if c>b and a then
maybe SX (d) is more than b and a so

a<b<c or d not sure which
sorry if I didn't help

3 0

3 years ago