Step-by-step explanation:
correct answer-C ( rhombus)
What is 60/50 as a percentage?
it would be 120
The answer is 252 ft3 because logically if the cubes had a length of one foot, the rectangular prism would be 756 feet, so you would just divide that number by three considering that the cubes are only 1/3 of a foot.
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Answer:
25 questions
Step-by-step explanation:
2 students can answer 40 questions in 1 h.
1 student can answer 20 questions in 1 h (60 min).
1 student can answer 5 questions in ¼ h (15 min).
5 students can answer 25 questions in ¼ h.
We know that
the <span>formula of the arithmetic series is
</span>Sn=<span>n[2(a1) + (n - 1)d]/2
where
Sn=80
n=20
d=2
a1=?
then
80=20*[2*a1+19*2]/2----------------> </span>160=[40*a1+760]
160=[40*a1+760]----------> a1=(160-760)/40------------> a1=-15
<span>
the answer is
a1=-15
</span>
