2 years ago

Find the area of the triangle

1 answer:

4 0

For this questions you need to memorize formula of triangle area. for question 5, just substitute the value into the formula. for Q6 you need to use pythagorean theorem formula to find the lenght of each triangle that i already seperated

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When finding the area of a circle if you are given the diameter how will you solve to find the radius

Travka [436]

To transform the diameter to the radius you will divide the diameter by 2

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2 years ago

Solve x2 - 3x = 28 by factoring.

Anastasy [175]

Answer:

Step-by-step explanation:

$x^2-3x=28\qquad\text{subtract 28 from both sides}\\\\x^2-3x-28=0\\\\x^2+4x-7x-28=0\qquad\text{distribute}\\\\x(x+4)-7(x+4)=0\\\\(x+4)(x-7)=0\iff x+4=0\ \vee\ x-7=0\\\\x+4=0\qquad\text{subtract 4 from both sides}\\\boxed{x=-4}\\\\x-7=0\qquad\text{add 7 to both sides}\\\boxed{x=7}$