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Svetllana [295]

4 years ago

13

In a quiz featuring 10 questions 5 marks are given for a correct answer and 2 for an incorrect answer. Jodie scored 15 and knows

she got 2 more correct than Mark
how many questions did Mark get right?
what was Marks score?

1 answer:

Bingel [31]4 years ago

3 0

I think Mark got 6 correct and his score was 13

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The median for the given set of six ordered data values is 30.5.

nikdorinn [45]

Answer:

x = 15

The median is the middle number, however, in this case there are two:

25 and x

The formula is:

23 + x/2 = 30.5

Subtract 23 from both sides:

23 + x - 23 = 30.5 - 23

Simplify:

x/2 = 7.5

Multiply both sides by 2:

2x/2 = 7.5 ⋅ 2

Therefore:

x = 15

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Rewrite the function f(x) = -2(x+3)^2 – 8 in the form f (x) = ax²+bx+c.

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Answer:

-2x^{2}-12x-26

Step-by-step explanation:

(x+3)^2 = x^2+6x+9

-2(x^2+6x+9)-8

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-2x^2-12x-26

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4 years ago

A property contained ten acres. How many lots of not less than 50 feet by 100 feet can be subdivided from the property if 26,000

NemiM [27]

Answer:

81 lots of 5,000 square feet fits in the property.

Step-by-step explanation:

<em><u>The first step </u></em>is calculate the square feet of the minimum area:

$50 \: feets \times 100 \: feet = 5,000 \:square \: feet$

<em><u>Second,</u></em> from the ten acres we subtract the 26,000 feets of roads:

$1 \: acre = 60 \: feet \times 660\:feet = 43,560\:square\:feet\\43,560 \times 10 = 435,600\\435,600 - 26,000 = 409,600 \:square \: feet\:available$

<em><u>Third,</u></em> we divide the lot area over the available square feet

$\frac{409,600}{5,000} = 81.92$

81 lots of 5,000 square feet fits in the property.

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The low temperature on Monday was 16°F. On Tuesday, the low was 18°F cooler. On Wednesday, the low temperature was –4 times Tues

drek231 [11]

Answer:

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Step-by-step explanation:

Given: The low temperature on Monday was 16°F. The low temperature on Tuesday was 18°F cooler. The low temperature on Wednesday was –4 times Tuesday’s temperature.

To find: expression that can be used to describe the low temperature on Wednesday

Solution:

Temperature on Monday = 16°F

So,

Temperature on Tuesday = $(16-18)\°F$

Temperature on Wednesday = $-4(16-18)\°F$

So, expression $-4(16-18)=(16-18)(-4)$ can be used to describe the low temperature on Wednesday.

Also,

$(16-18)(-4)=[16 + (-18)](-4)\,\,\left \{\because (a-b)=\left [ a+(-b) \right ] \right \}$

So, expression $[16 + (-18)](-4)$ also represent temperature on Wednesday.

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Answer:

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