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daser333 [38]
3 years ago
9

In a survey of 400 students, 80% said they had math homework every night. Of these, 40% had writing homework every night. How ma

ny students had both math and writing every night?
A. 50
B. 128
C. 160
D. 320
Mathematics
1 answer:
natali 33 [55]3 years ago
7 0
It is D. 320 because if you add 80 and 40 togeter you get 120 then 320

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A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 3 large boxes and 5 small boxes has a t
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Answer:

Large box weighs 18.25 kilograms

Small box weighs 15.25 kilograms

Step-by-step explanation:

A fruit company delivers its fruit in two types of boxes: large and small.

Let x = weight of large box.

Let y = weight of small box.

A delivery of 3 large boxes and 5 small boxes has a total weight of 131 kilograms. This means

3x + 5y = 131 - - - - - - - - - - -1

A delivery of 6 large boxes and 2 small boxes has a total weight of 140 kilograms.

This means 6x + 2y = 140 - - - - - - - 2

Solving equation 1 and equation 2 by elimination method,

Multiply equation 1 by 6 and equation 2 by 3

18x + 30y = 786

18x +6y = 420

24y = 366

y = 366/24 = 15.25

Put y = 15.25 in equation 1

3x + 5× 15.25 = 131

3x + 76.25 = 131

3x = 131 - 76.25

3x = 54.75

x = 54.75/3 = 18.25

5 0
3 years ago
Plzz help due in 2 mins
daser333 [38]

Answer:

19.84

the decimal has to stay in the same place

Step-by-step explanation:

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What is the net force on an object that has a 25N force pulling it to the right, and two 10N forces pulling it to the left?
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5N

Step-by-step explanation:

25 - (10 x 2) = 5N

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When I solved it I got 750.(273÷.35=780)
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Which number is a factor of 22 but not multiple of 2 ?
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Step-by-step explanation:

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