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Morgarella [4.7K]
2 years ago
5

Zahara constructs 5 mirror frames in 30 minutes. At that rate, how many mirror frames can Zahara make in 9 hours

Mathematics
1 answer:
NARA [144]2 years ago
6 0

Answer:

90 mirrors

Step-by-step explanation:

If 5 mirrors=30 mins

then x=9 hrs

therefore 30÷60 to covert it to hours is equal to 0.5hr

5×9hrs÷0.5hr=90

therefore x=90

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If a point P(1, –2) is reflected across the line x = 3, what are the coordinates of its reflection image?
Simora [160]
P'=(5,-2)
5 0
2 years ago
If a and b are independent events, p(a)=0. 20, and p(b)=0. 80, what is p(b|a)?.
goldfiish [28.3K]

Answer:

P(B | A) = 0.80

Step-by-step explanation:

For independent events A and B,     P(B | A) = P(B)

Therefore, P(B | A) = 0.80

3 0
2 years ago
Robert owns two dogs. Each day, one dog eats
notsponge [240]

Answer:

1/3

Step-by-step explanation:

1) 1/6+1/6= 2/6

2) 2 and 6 can both be divide be 2.

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6 0
2 years ago
Albert wants to show that tan(theta)sin(theta)+cos(theta)=sec(theta). He writes the following proof:
Nataly_w [17]
We have that
<span>tan(theta)sin(theta)+cos(theta)=sec(theta)
</span><span>[sin(theta)/cos(theta)] sin(theta)+cos(theta)=sec(theta)
</span>[sin²<span>(theta)/cos(theta)]+cos(theta)=sec(theta)

</span><span>the next step in this proof
is </span>write cos(theta)=cos²<span>(theta)/cos(theta) to find a common denominator
so

</span>[sin²(theta)/cos(theta)]+[cos²(theta)/cos(theta)]=sec(theta)<span>

</span>{[sin²(theta)+cos²(theta)]/cos(theta)}=sec(theta)<span>

remember that 
</span>sin²(theta)+cos²(theta)=1
{[sin²(theta)+cos²(theta)]/cos(theta)}------------> 1/cos(theta)
and 
1/cos(theta)=sec(theta)-------------> is ok

the answer is the option <span>B.)
He should write cos(theta)=cos^2(theta)/cos(theta) to find a common denominator.</span>
6 0
3 years ago
Read 2 more answers
Find the percent of error if the estimate is $230 and the actual amount is $245. round to the nearest whole percent.
qwelly [4]

Percentage error = 245-230/245 * 100 = 15/245 * 100 = 6.12%

After rounding off, it would be 6%

5 0
2 years ago
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