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Dvinal [7]
3 years ago
8

Martin earned the following scores on his last five tests.

Mathematics
1 answer:
Arada [10]3 years ago
8 0
IQR= 18 is the interquartile range of his scores.
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A triangle has side lengths of 12 millimeters, 17 millimeters, and 13 millimeters. Is this triangle equilateral?
nordsb [41]
No, this triangle is not equilateral. This triangle is scalene. All three sides are of different lengths, which is why it's scalene. In order to have an equilateral triangle, all three sides need to be the same length. 
7 0
3 years ago
I need help, does anyone understand this?
Mama L [17]

a so-called zero or solution is really just an x-intercept, in which case we set the dependent variable to 0, namely y = h(x) = 0 and solve for x to get it.

\bf h(x)=4x^2-8x-60\implies \stackrel{h(x)}{0}=4x^2-8x-60\implies \stackrel{\textit{dividing by 4}}{0=x^2-2x-15} \\\\\\ 0=(x-5)(x+3)\implies x= \begin{cases} 5\\ \boxed{-3} \end{cases}

why is -3 the smallest? well, -3 is much smaller than 5 :), the further to the left you go on the number line, the smaller the number.

4 0
3 years ago
Read 2 more answers
Which statements are true regarding the rotational symmetry of the shape of a cross? Select three options.
Inga [223]

Answer:

The correct options are;

1) The shape maps unto itself after a rotation of 270 degrees

2) The smallest angle of rotational symmetry is 90 degrees

3) The shape maps unto itself after a rotation of 180 degrees

Step-by-step explanation:

We note that the shape of a cross which consists of two equal members (segments) bisecting each other at right angles such that when a member is placed vertically upright, the other member will be horizontal, therefore we have;

After rotation by 90 degrees, the vertical member will become horizontal and vice versa

After rotation by 180 degrees, the vertical member will become horizontal and vice versa again

Similarly, after rotation by 270  degrees, the once vertical member will become horizontal and the horizontal member will become vertical

6 0
3 years ago
Which is the best estimate for the quotient of 404.31 devided by 48.031 ? A. 8,000 B. 800 C. 80 D. 8 Help me plz
Novay_Z [31]
D. is correct hope it helps
6 0
3 years ago
Read 2 more answers
To wash a window that is 4 meters off the ground, Rafi leans a 5-meter ladder against the side of the building. To reach the win
Andre45 [30]

Answer:

Base of the ladder is 3 meters away from the building.

Step-by-step explanation:

Let's use Pythagoras theorem to solve.

Pythagoras theorem says,

a^{2} +b^{2} =c^{2}

Here let horizontal distance is "a''

Vertical distance of window is 4 m

So, b=4

The Rafi leans 5 m ladder against the wall. So, c=5.

a^{2} +4^{2} =5^{2}

Simplify it

a^{2} +16=25

Subtract both sides 16

a^{2} =9

Take square root on both sides

a=±3

So, base of the ladder is 3 meters away from the building.

5 0
3 years ago
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