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Masja [62]
3 years ago
6

. In their yearbook photo, students in the chorus stood in four rows with 13 students in each row. How many students are in the

photo?
Mathematics
2 answers:
valentinak56 [21]3 years ago
7 0

Answer: There are 52 students in the photo.

Step-by-step explanation:

Given : In their yearbook photo, students in the chorus stood in four rows with 13 students in each row.

i.e. Number of rows = 4

Number of students in a row = 13

Then , the number of students in the photo is given by :-

4\times13=52

Therefore, there are 52 students in the photo.

ehidna [41]3 years ago
6 0
Multiply 13 by 4 and you get 52
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Juli2301 [7.4K]

Answer:

x = 8*root3

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Step-by-step explanation:

You can use tangent and cosine of 60° to find x and y, BUT THERE'S A SHORTCUT. You pointed out that its a 30°-60°-90° triangle. That is a special right triangle. Here's the shortcut:

the longest side (hypotenuse) is double the shortest side. We have an 8 on the shortest side, so the hypotenuse (longest side) is 16. This ALWAYS works for 30°-60°-90° triangles!

Another shortcut:

The longer leg is the shorter leg × root3.

This ALWAYS works on 30°-60°-90° triangles.

So on your triangle, the short side is 8, that means the longer leg is 8×root3.

ta-daaaa!

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3 years ago
if trapezoid ABCD was reflected over the y-axis, reflected over the x-axis, and rotated 180°, where would point A’lie
maria [59]

Answer:

<em>Answer: (second option) (-4,1)</em>

Step-by-step explanation:

<u>Transformations of Points and Shapes</u>

The image shows a trapezoid ABCD where point A has coordinates (-4,1).

The following transformations are performed:

Reflection over the y-axis: If a point (x,y) is reflected over the y-axis, it becomes (-x,y). Thus point A becomes A'=(4,1)

Reflection over the x-axis: If a point (x,y) is reflected over the x-axis, it becomes (x,-y). Thus point A' becomes A''=(4,-1)

Rotation 180°: If a point (x,y) is rotated 180°, it becomes (-x,-y). Thus point A'' becomes A'''=(-4,1)

Answer: (second option) (-4,1)

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3 years ago
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Answer:

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