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Julli [10]
3 years ago
15

a test is worth 50 points.multiple choice questions are worth 1 point, and short answer questions are 3 points. If the test has

20 questions, how many multiple choise questions are there?
Mathematics
2 answers:
7nadin3 [17]3 years ago
8 0
Is there any options.
frosja888 [35]3 years ago
7 0
X = # of MC, y = # of SA

x + y = 20
x + 3y = 50

Solve the system of equations and you'll have y = 15, x = 5

So 5 MC questions
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At a schools field day, students will throw table tennis balls then measure the distance. There are 626 students in the school.
qaws [65]

Answer: 105 packs

Step-by-step explanation: The correct answer is 105 packs of table tennis balls. You need a total of 626 balls, so you divide this by 6 because that is what a standard package contains. The formula is 626/6 = 104.3. You will need 104 packs plus .3 of a pack, which means that you need to round it up to 105 packs of table tennis balls.

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Answer:

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3 years ago
A car is traveling at a speed of 44 feet per second. what is the car's speed in miles per hour? how many miles will the car trav
Sladkaya [172]
44 feet. 3600 seconds. 1 mile
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1 second 1 hour. 5280 feet

I wrote it this way so the units cancel out. You are multiplying the fractions by each other

The car is going 30 mph, and will go 120 miles in 4 hours.
4 0
3 years ago
Read 2 more answers
30 girls and boys have planned for a picnic.There is a ratio of 3 girls to 7 boys.How many boys are there?
aksik [14]
3 times 10 is 30, 7 times 10 is 70. There are 30 girls and 70 boys.
4 0
3 years ago
In autumn a tree starts to shed its leaves. 2/5 of the leaves fall off in the first week. 1/2 of those remaining fall of in the
Oduvanchick [21]

Answer:

850 leaves were on the tree initially.

Same as;

2/5 + 1/5 + 3/10 + (remaining leaves 1/10) = 1

4/10 + 2/10 + 3/10 + 1/10

10 x 85 = 850

Step-by-step explanation:

2/5  wk 1 fall off

1/5  wk 2 fell off

3/5 x 1/2  = 3/10 wk 2 stayed on tree

1/3 x 3/10 = 1/10 wk 3 stayed on

2/5 + 1/5 + 3/10 = 9/10 =  0.9 fall off in total

10/10 - 9/10 = 1/10 left on tree

1/10 = 85

10 x 85 = 850 leaves.

8 0
3 years ago
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