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Ksju [112]
3 years ago
11

Rosita had 17 subtraction problems and 28 multiplication problems. If she ca finish five problems in 20 minutes, how long will i

t take her to finish all the problems?
Mathematics
2 answers:
lana [24]3 years ago
8 0

Step-by-step explanation:

total problems = 17+28=45

If she ca finish five problems in 20 minutes,

so...

for 45 problems

she take 45/5*20=180 minute = 3hour

tamaranim1 [39]3 years ago
5 0

Answer:

It would be 3 hours

Step-by-step explanation: you add 17+28 and you get 45, then you divide 45by 5 which gets you 9 and then you add 20 together 9 times

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Step-by-step explanation:

Let DE = x cm.

Since DE is parallel to AB therefore by the alternate interior angles theorem, m∠BAD = m∠ADE and m∠ABE = m∠DEB ............(1)

As AD is an angle bisector of ∠A, therefore m∠EAD = m∠DAB ; Since BE is an angle bisector of ∠B ⇒ m∠ABE = m∠EBD.

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⇒ x = 6

Hence, the length of DE is 6 cm.


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