3 years ago

What kind of problem is this

Mathematics

2 answers:

antiseptic1488 [7]3 years ago

8 0

$(x-5y)^2=x^2-2\cdot x\cdot5y+(5y)^2=x^2-10y+25y^2$

Anvisha [2.4K]3 years ago

6 0

Answer:

Step-by-step explanation:

lets say x is one and y is 1. 5 times 1 is five and to the power of 2 thats 25 and minus 1 equals 24

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A regular triangular pyramid has a base area of 31.5 mm2 and a surface area of

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Answer:

A) 220.5 mm^2

Step-by-step explanation:

<u>Explanation</u>:-

Given A regular triangular pyramid has a base of area is 31.5mm^2

and also given surface area of triangular pyramid is 252 mm ^2

by using formula

surface area of regular triangular pyramid = base of area + half of lateral surface.

$surface area = area of the pyramid X \frac{1}{2} lateral surface$

252 = 31.5 + $\frac{1}{2} lateral surface$

$252-31.5= \frac{1}{2} lateral surface$

220.5 = lateral area of triangular pyramid

lateral area of triangular pyramid = 220.5 mm^2

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As an estimation we are told 5 miles is 8 km.<br> Convert 60 miles to km

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