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Allushta [10]
3 years ago
14

There were 90 days in the first semester of Margaret’s school year. If she brought her lunch to school 30% of the time, how many

days did she bring her lunch during the first semester?There were 90 days in the first semester of Margaret’s school year. If she brought her lunch to school 30% of the time, how many days did she bring her lunch during the first semester?
Mathematics
1 answer:
Natasha2012 [34]3 years ago
7 0

Answer:

27 days

Step-by-step explanation:

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Solve the following system : -x + 5y = 8 and 3x + 7y = -2
poizon [28]

-x + 5y = 8

multiply this equation by 3

-3x + 15y = 24

now add it to the other equation  ( elimination)

-3x + 15y = 24

3x + 7y = -2

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0x  + 22 y = 22

divide each side by 22

y =1


substitute into -x + 5y =8  to find x

-x + 5(1) = 8

-x + 5 = 8

-x =3

divide by -1

x =-3

Answer (-3,1)

Choice A


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3 years ago
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aivan3 [116]

Answer:

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Step-by-step explanation:

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Find m angle Y
LiRa [457]
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A coin will be tossed three times, and each toss will be recorded as heads (H) or tails (7). Give the sample space describing al
Fynjy0 [20]

Answer:

A). {HHH, HHT, HTH, THH, TTH,THT,HTT,TTT}

(B). {HHH, HHT, THH, THT}

Step-by-step explanation:

Given:

A coin is to be tossed three times and each tossed will be recorded as Head(H) and Tails(T).

To Find:

(a). Sample Space

(b). Event that the second toss is Heads

Explanation:

(A). Sample Space: When a coin is tossed 3 times

{HHH, HHT, HTH, THH, TTH,THT,HTT,TTT}

(B). Event that second toss is Head

{HHH, HHT, THH, THT}

6 0
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