Can someone help me with this page

Mathematics

1 answer:

Ksju [112]3 years ago

7 0

The first one is A. Number 2 is d. Number 3 is b because 20x20=400 and 21x21=441 and when you add them together you get 841 or 29x29. Number 4 is b because complementary angles are also right angles, they have to add up to 90 degrees. Number 5 is a because every angle is less than 90 degree. Number 6 is 30 because 60+90+x = 180 and when you solve for x you will get 30 degrees.

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If x2+y2=40 and xy=5 then find(x+y)2

VMariaS [17]

Answer:

(x + y)^2 = 45

Step-by-step explanation:

$(x + y)^{2} = x^{2} +xy + y^{2}$

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3 years ago

Reed uses 8 pieces of glass per square foot to make a stained glass window. How many pieces of glass will he need to make a wind

laiz [17]

To solve the problem posed in the statement we need to know the equivalence between squared foot and squared inches, and that is:
1 square foot = 144 square inches
So Reed uses 8 pieces of glass per 144 squared inches as well.
Now we can use a rule of three, simple and direct proportion to solve the question, it goes like this:
144 squared inches ------> 8 pieces glass
864 squared inches ------> x

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3 years ago

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Triss [41]

Note: Consider we need to find the factor form of the given expression by taking out the GCF.

Given:

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