Evaluate the following expression using the values given: find 3x2 − y3 − y3 − z if x = 3, y = −2, and z = −5. numerical answers expected!

3x2 - y3 - y3 - z if x = 3, y = -2, and z = -5?

= 3x^2 -2y^3 -z

= 3(3^2) - 2( -2)^3 - (-5)

= 3(9) -2( -8)+5

= 27 +16 +5

= 48

* Minus times a minus = a plus

Hope it’s helps!

You must plug all the given numbers into the problem

3(3)^2- (-2)^3 - (-2)^3 - (-5)

the you calculate the exponents

3(9) - (-8) - (-8) - (-5)

3 times 9 is 27

27 - (-8) - (-8) - (-5)

now you can change the negatives to positives because a negative times a negative is a positive

27 + 8 + 8+ 5 = 48

30 people weigh 160 pounds or more

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.