Answer: the spring would be stretched by 38 inches.
Step-by-step explanation:
The length that a hanging spring stretches varies directly with the weight placed at the end of the spring. Let L represent the length of the spring and let w represent the weight placed at the end of the spring. Introducing a constant of variation, k, the expression would be
L = kW
If a weight of 15lb stretches a certain spring 19in, the expression would be
19 = 15k
k = 19/15
The equation would be
L = 19w/15
if the weight is increased to 30lb, then the length by which the spring would be stretched is
L = 19 × 30/15
L = 38 inches
Answer-5 + -4 = -9. The answer is “add -4”
Step-by-step explanation:
Answer:
(6P-4M)(6P+4M)
Step-by-step explanation:
can be factored using the "difference of squares" formula which is .
6*6=36 and 4*4=16; P*P=P^2 and M*M=M^2 -- from this we know that the two variables on each side of the minus sign are perfect squares. Now, see as to make it fit nicer to the formula.
So, .
If you forget the formula, you can always go backward on multiple-choice questions like this one. Use FOIL to expand your factored answers.
D.6x^2+3x+3, to find your answer combine like terms. ex: x^2 and 5x^2 have ^2 in common so combine to get 6x^2.