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3 years ago

Help needed with all pls

Mathematics

1 answer:

Olenka [21]3 years ago

3 0

#5 is 5 days
40×5=200
200+150=250

20×5=100
100+150=250

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Ned took a test with 20 questions. He lost 3 points for each of the 5 questions he got wrong and earned an additional 12 points

marusya05 [52]

Answer:

He lost 15 points and recieved 12 points back now he missing 3 points

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2 years ago

It is given that y is directly proportional to x. When x = 3, y = 18. (a) Find the equation connecting x and y. (b) Hence, find

guapka [62]

Answer:

see explanation

Step-by-step explanation:

(a)

Given y is directly proportional to x then the equation relating them is

y = kx ← k is the constant of proportion

To find k use the condition when x = 3, y = 18 , then

18 = 3k ( divide both sides by 3 )

6 = k

y = 6x ← equation of proportion

(b)

(i)

when x = 12 , then

y = 6 × 12 = 72

(ii)

when y = 42

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2 years ago

How can i estimate a number from a bar graph??

olga55 [171]

You should first find out what lines are what,
Like for example, If you had 5 - 10 - 15 as the Y Lines and the bar was between 5 and 10 then your best bet would be to estimate what the middle of 5 and 10 is which would be 7 or 8.

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3 years ago

What do i do?? i just have to find what the the question marks show.

lina2011 [118]

------------------------------------------------------
Given information
------------------------------------------------------
100% = $27.60

------------------------------------------------------
Rewriting it
------------------------------------------------------
$\$27.60 = 100 \%$
$\$1 = 100 \div 27.60 \%$
$\$1 = \frac{250}{69} \%$

------------------------------------------------------
Find $4.14 in percentage
------------------------------------------------------
$\$1 = \frac{250}{69} \%$
$\$4.14 = \frac{250}{69} \times 4.14$
$\$4.14 = 15%$

------------------------------------------------------
Answer: 15%
------------------------------------------------------

------------------------------------------------------
Find $31.74 in percentage
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$\$1 = \frac{250}{69} \%$
$\$31.74 = \frac{250}{69} \times 31.74$
$$31.74 = 115%$

------------------------------------------------------
Answer: 115%
------------------------------------------------------

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3 years ago

Your class has 30 students. if 1/3 of them walk to school, how many students in your class walk to school

Delvig [45]

1/3 of 30 would be 10. So 10 students walk to school.

4 0

3 years ago