Please hurry Theo was doing research to support the claim that
exercise increases heart and lung health. He had 50
people do a rigorous exercise program. Each week, for
six months, he tested their heart and respiratory rate. He
determined that exercise does increase heart and lung
health.

Which best describes his claim?

A-It is valid because he used multiple trials.

B-It is invalid because he did not have a control group

C-It is invalid because his sample size was small.

D- It is valid because he controlled the exercise
program.

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

let's solve your equation step-by-step.

24−3x=−27

step 1: simplify both sides of the equation.

24−3x=−27

24+−3x=−27

−3x+24=−27

step 2: subtract 24 from both sides.

−3x+24−24=−27−24

−3x=−51

step 3: divide both sides by -3.

−3x

−3

=

−51

−3

x=17

answer:

x=17

step-by-step explanation:

mark brainliest and have a great day!

answer: your gay

step-by-step explanation:

you dont know math

it shoild be o

step-by-step explanation: