3 years ago

What will be the new coordinates of (3, -1) if it is reflected across the y-axis

Mathematics

1 answer:

Vaselesa [24]3 years ago

7 0

Answer:

(-3,-1)

Step-by-step explanation:

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Hi :), im really struggling with this. Just wanted to know if anyone can explain step by step for me please. Id really appreciat

Dvinal [7]

Answer:

314 m²

Step-by-step explanation:

the formula for the surface area of a sphere (As) is

As = 4×pi×r²

the radius r (half of the diameter) is clearly indicated as 5m.

so, As = 4×3.14×5² = 4×3.14×25

I don't even need a calculator for this, as 4×25 = 100

so, As = 100×3.14 = 314

(you know, when multiplying by 10, the decimal point moves right one position. multiply by 100 it moves 2 positions, and so on).

7 0

2 years ago

An athlete runs around a circular track. The track has a diameter of 200 feet. How many laps does she need to take to run a mile

Shtirlitz [24]

First you have to figure out the length of the track:

$2 * \pi * r$

r is the half of the diameter:
200ft : 2 = 100ft

$2* \pi *100ft$ = 200 $\pi$ ≈ 628,31

The athlete has to run ca. 5280ft for one mile:

5280 : 628,31≈8,4

The athlete has to run 8,4 laps

3 0

2 years ago

Find the shorter base of a trapezoid if the trapezoid's area is 52, its altitude is 8, and its longer basis 10.

DiKsa [7]

Answer:

The shorter base is 3

Step-by-step explanation:

$a = \frac{(b1 + b2)}{2} \times h$

$52 = \frac{(10 + b2)}{2} \times 8$

$b2 = 3$

8 0

2 years ago

Ray Of Light [21]

C
A square can be defined as a rhombus which is also a rectangle – in other words, a parallelogram with four congruent sides and four right angles. A trapezoid is a quadrilateral with exactly one pair of parallel sides.

3 0

2 years ago

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%3F%7D%7B%3F%7D%207" id="TexFormula1" title=" \frac{?}{?} 7" alt=" \frac{?}{?} 7"

belka [17]

Hi, I'd be glad to help you with this equation.

The answer is (33/43)

Hope this helps.
Have a great day!

3 0

2 years ago