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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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The length of time, y hours, it takes to put a jigsaw puzzle together is inversely proportional to the number of children, x, wo
andrew11 [14]

Answer:

<em>24 children</em>

Step-by-step explanation:

If the length of time, y hours, it takes to put a jigsaw puzzle together is inversely proportional to the number of children, x, this is represented as;

y  \alpha \frac{1}{x}\\y =\frac{k}{x}

k is the constant of proportionality

If it takes 16 children 6 hours to put the jigsaw puzzle together, this means at x = 16, y = 6

Substitute:

6 = k/16

k = 6*16

k = 96

W are to find number of children needed to put the same jigsaw puzzle together in 4 hours, this is done by substituting k = 96 and y = 4 into the expression y = k/x

y = 96/4

y = 24

<em>Hence it will take 24 children to put the same jigsaw puzzle together in 4 hours</em>

<em></em>

5 0
3 years ago
The packaging lists a model airplane’s length as 10.5 in. It also gives the scale as 1:83. What is the length of the actual airp
Lana71 [14]
\bf \cfrac{\stackrel{model}{length}}{\stackrel{actual}{length}}\qquad 1:83\qquad \cfrac{1}{83}\implies \cfrac{1}{83}=\cfrac{10.5}{x}\implies x=\cfrac{83\cdot 10.5}{1}&#10;\\\\\\&#10;x=871.5~inches&#10;\\\\\\&#10;\textit{there are 12 inches in 1 foot, thus }&#10;\\\\\\&#10;871.5~\underline{in}\cdot \cfrac{ft}{12~\underline{in}}\implies 72.625~ft &#10;\qquad \approx 73~ft
6 0
3 years ago
A cookie recipe states for every 3 cups of flour, 1.5 teaspoons of vanilla are
guapka [62]

Answer:

2.5 Teaspoons of vanilla are needed.

Step-by-step explanation:

If 3 cups of flour is 1.5 teaspoons of vanilla. 1.5 /3=.5 Meaning there is .5 teaspoons of vanilla per cup of flour.

If you have 5 cups of flour   5 x .5= 2.5 (teaspoons)

7 0
3 years ago
Please I need help!!
nata0808 [166]

The largest  possible complete design that can be painted on a 24’ x 16’ wall is 252' by 189'

<h3>Scale drawing</h3>

Scale drawing involves drawing a drawing in a different size and dimension that is proportional to the original dimension

<h3>Dimensions</h3>

The dimensions of the design for the farm scene painting is given as:

12" \times 9"

The dimensions of the wall is given as:

24' \times 16'

Convert feet to inches

24' \times 16' = (24 \times 12") \times (16 \times 12")

24' \times 16' = (288") \times (192")

Divide the dimensions of the wall by the painting to get the scale ratios (k)

k = \frac{288}{12}

k = 24

Also, we have:

k =\frac{192}{9}

k =21.33

Remove decimal (do not approximate)

k =21

By comparison;

21 is less than 24

Multiply 21 by the dimensions of the painting

So, we have:

Length = 12 \times 21 = 252

Width = 9 \times 21 = 189

Hence, the largest  possible complete design that can be painted on a 24’ x 16’ wall is 252' by 189'

Read more about scale drawings at:

brainly.com/question/810373

7 0
2 years ago
Mary pilgrim baked 23 apple pies and 45 pumpkin pies if she gives 32 pies away how many pies does she left
kirill [66]

Answer: 36

Step-by-step explanation:

if you add 23 and 45 to get your total you get 68. If you are giving away 32, you need to subtract it and you get 36.

5 0
3 years ago
Read 2 more answers
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