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3 years ago

X^2 - 25 = 25 solve for x

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

3 0

Answer:

$\tt x=\pm5\sqrt{2}$

Step-by-step explanation:

$\tt x^2 - 25 = 25$

$\tt x^2-25+25=25+25$ (Add 25 to both sides)

$\tt x^2=50$ ( Take square of both sides)

$\tt x=x=\sqrt{50},\:x=-\sqrt{50}$

$\tt x=\pm5\sqrt{2}$

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What is the area of 14 and5.5

abruzzese [7]

Answer:

Step-by-step explanation:

The area of 14 and 5.5 is 77 because 14 x 5.5 = 77. You are multiplying the 2 diameters to get the area.

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3 years ago

What is the area of trapezoid ABCD? A(-2,2) B(2,5) C(11,-7) D(1,-2)

Ksenya-84 [330]

Answer:

50 sq. units

Step-by-step explanation:

Join one diagonal of the trapezoid ABCD.

Assume that AC is the diagonal.

So, Area of the trapezoid = Area of Δ ABC + Area of Δ CAD.

Now, coordinates of A(-2,2), B(2,5), C(11,-7) and D(1,-2) are given.

We know, that three vertices of a triangle are $(x_{1},y_{1} )$ , $(x_{2},y_{2} )$ and $(x_{3},y_{3} )$ respectively, then the area of the triangle will be given by

$\frac{1}{2} |x_{1}(y_{2}-y_{3})+x_{2}(y_{3}-y_{1})+ x_{3}(y_{1}-y_{2} ) |$

Hence, area of Δ ABC will be

$\frac{1}{2} |-2(5-(-7))+2(-7-2)+11(2-5)|= 37.5$ sq units.

Again, area of Δ CAD will be

$\frac{1}{2} |11(2-(-2))-2(-2-(-7))+1(-7-2)|= 12.5$ sq units.

Therefore, the area of the trapezoid ABCD will be (37.5 + 12.5) = 50 sq, units. (Answer)

4 0

4 years ago

PLEASE pLEASE HELP!!!!!!!!

sleet_krkn [62]

Answer: B = 73

Step-by-step explanation:

Since A = 17 degrees and there's already a right angle (90 degrees)

They add up to 107 degrees meaning the last angle is 73 because

the sum of interior angles add up to 180.

I'm sorry I couldn't find the other ones ( I don't have time )

but I'll give you a hint. You'll need to use Sine, Cosine, or Tangent

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3 years ago

Help please!! if it’s correct ill mark you as brainliest

Levart [38]

Answer:

$\frac{2\pi }{25}$

(8^2 x pi)/ (20x40)

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3 years ago

Icecream store sells 3 pints of icecream for 15.00 how much icecream can u get per dollar

KATRIN_1 [288]

Answer:

you can get .2 of a pint

Step-by-step explanation:

3 pints is $15 which means that one pint is 5. that one pint of ice cream has 5 dollars worth and since you only want for one dollar, it would be .2 because it's split into 5 parts.

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3 years ago