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3 years ago

John is having an exam with Questions that require many answers.The Exam has 20 questions.

Mathematics

1 answer:

Igoryamba3 years ago

6 0

to get 52 marks there has to be a combo of right and wrongs marks.

i just used trial and error, and logic that there must me more right than wrong to get::

13 right answers (13x5=65)

+ 7 wrong (-2x7=-14)

65-14=51

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4 years ago

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Given α and β are Supplementary. Show the necessary steps.

user100 [1]

Answer:

$\alpha = 108\degree, \: \beta = 72\degree$

Step-by-step explanation:

α and β are Supplementary (given)

$\therefore \alpha + \beta = 180\degree.... (1)$

It is given that:

$\alpha= \frac{3}{2} \beta$

Plugging the value of α in equation (1), we find:

$\frac{3}{2} \beta + \beta = 180\degree$

$\therefore \frac{3+2}{2} \beta = 180\degree$

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$\alpha = 108\degree, \: \beta = 72\degree$

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3 years ago

John makes $400 per week. What does it mean for him to get a 150% salary raise? Explain in words and then give an example showin

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He’s gotten a 200$ raise

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3 years ago

A ball is dropped from the top of a building that is 250 feet tall. The

Virty [35]

-16t²+250 = 75

-16t² = 75 -250

-16t² = -175

t² = -175 /-16

t² = 175/16

Here there si two solutions : t = $\sqrt{175/16}$ and t = - $\sqrt{175/16}$

However, as time cannot rewind, we will keep only positive solution

So t = $\sqrt{175/16}$

in seconds it will be : 3.3 seconds

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