3 years ago

Can someone please help me with this for brainliest? It's true or false questions

Mathematics

2 answers:

AfilCa [17]3 years ago

4 0

Answer:

the answer would be the last one because 275% equal 2.75 if you decide it

swat323 years ago

3 0

Answer: false, false, true, true, true

Step-by-step explanation:

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Alan, Brady and Matt shared 740 marbles. Alan has 20 fewer marbles than Brady and 120 fewer marbles than Matt. How many marbles

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Answer:

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Step-by-step explanation:

$Let\ Alan\ have\ =x\ marbles\\Brady\ have = (x+20)\ marbles\\Matt\ have = . (x+120)\ marbles\\\\Total\ marbles = 740\\x+(x+20)+(x+120)=740\\x+x+20+x+120=740\\3x+140=740\\3x=740-140\\3x=600$

Dividing $3$ both sides.

$\frac{3x}{3}=\frac{600}{3}\\\\x=200$

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4 years ago

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Internal Validity is high in an experiment. when it demonstrates persuasively that changes in behavior are caused by the independent variable and not by unknown factors.

What is Internal Validity?

Internal validity is defined as the degree to which the observed results represent the truth in the population under investigation and are not the consequence of methodological flaws.
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