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3 years ago

Martin earned the following scores on his last five tests.

Mathematics

2 answers:

mixas84 [53]3 years ago

8 0

Answer:

Hi the answer would be 18. Hope I helped

Step-by-step explanation:

egoroff_w [7]3 years ago

7 0

98, 78 , 84, 75, 91

The interquartile range formula is the first quartile subtracted from the third quartile:

IQR = Q3 – Q1.

****************************************************
Step 1: Put the numbers in order.
75, 78, 84, 91, 98

Step 2: Find the median.
75, 78, 84, 91, 98

Step 3: Place parentheses around the numbers above and below the median. 
Not necessary statistically, but it makes Q1 and Q3 easier to spot.
(75, 78), 84, (91, 98)

Step 4: Find Q1 and Q3
Think of Q1 as a median in the lower half of the data and think of Q3 as a median for the upper half of data.
(75, 78), 84, (91, 98)

*(75, 78) ---> (75 + 78) ÷ 2 = 76.5
*(91, 98) ---> (91 + 98) ÷ 2 = 94.5

Step 5: Subtract Q1 from Q3 to find the interquartile range.
94.5 – 76.5 = 18

IQR = 18

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Which expression is equivalent to the area of metal sheet required to make this square-shaped traffic sign?

Lelechka [254]

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A is the correct answer

Step-by-step explanation:

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2 years ago

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Lady_Fox [76]

The measure of the angle ∠PQR is 90 degrees

<h3>How to prove that ∠PQR is 90 degrees?</h3>

The equation of the line PQ is given as:

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The coordinates of the QR are given as:

(0, -2) and (6, -4)

Make y the subject in 3x - y - 2 = 0

y = 3x - 2

The slope of the above line is

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Next, we calculate the slope (m2) of points Q and R.

So, we have:

m2 = (y2- y1)/(x2 - x1)

This gives

m2 = (-4 + 2)/(6 - 0)

Evaluate

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This means the lines PQ and QR are perpendicular lines.

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2 years ago

What is a quadratic equation? And how do you solve them?

Allisa [31]

Answer:

A quadratic equation is some thing like

(x+2)^2

(x+2)(x+5)

In order to solve them, the most basic method is the FOIL method

F-First

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L-Last

So for example

(x+2)^2

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(x+2)(x+2)

So the first is the 2 Xs

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(x+2)(x+2)

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(x+2)(x+2)

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And finally the last which is the 2 and the second 2

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2*2=4

Now add them all up

X^2+2x+2x+4

Combine like terms

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There you have it

Do the same with every other quadratic equation

3 0

3 years ago

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anygoal [31]

Answer:

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5 0

3 years ago

Read 2 more answers

Can some one do this and help me out

alexira [117]

Answer:

Step-by-step explanation:

Numbers less than 10 are = 1, 2, 3, 4, 5, 6, 7, 8, and 9.

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I eliminated the numbers to get the answer.

Hope this helped!

5 0

3 years ago