06/28/19

Survey of math question

​Ms. Teller surveyed the 35 students in her class about their families. 27 students have a brother or a sister, 16 students have a brother, and 8 students have both a brother and a sister. How many... more
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06/28/19

What is the value of the expression -3x^2y+4x when x= -4 and y=2?
What is the value of the expression (-3x2y+4x) when x= -4 and y=2?
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06/27/19

How do you evaluate this? (x + 7)(x2 – 3x + 2). Please, step by step solving, so I can understand.
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06/27/19

If Tan^2(t)-Sin^2(t)=Sin^a(t)/Cos^b(t), then the positive power a= ALSO the positive power b=
So, I know the first two stepssin^2(t)/cos^2(t) -sin^2(t)sin^2(t)-sin^2(t)cos^2(t)/(cos^2(t)I have no idea what to do after this? I looked and it said to factor but I have no idea why you factor... more
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06/27/19

In 2x years from today, a computer will be 75% of (y + 1/2) times its current age. How old is the computer now?
In 2x years from today, a computer will be 75% of (y + 1/2) times its current age. How old is the computer now?
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06/10/19

A natural number whose squares diminished by 84 is equal to thrice of 8 more than that number?
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06/08/19

cos(a-b)cos(b)-sin(a-b)sin(b)
i dont have the greek symbols but what would this be simplified using only one expression???
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05/29/19

Jill’s marathon

Jill runs 3 1/3 kilometres 3 times a week. How many kilometres will she run in 3 weeks?
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05/20/19

similiar shapes

on a map 1/4 inch represents 350 miles how long would a line on a map need to be in order to represent 3200 miles
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05/15/19

Joyce and Sofia are giving gifts to their 8 favorite staff in PS91Q.Each staff is given 3 cupcakes.If each cupcake is $2,how much money did Joyce and Sofia waste on cupcakes?
fraction
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05/10/19

How do I calculate n in this equation 39=1/pi x 11 x n? (I really need to learn math over again, some lessons. I totally forgot most and am a bit ashamed actually.)
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05/10/19

Given that z=3-i is one root of the equation z^2+az-10i=0, what is the value of a?
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05/10/19

F(x) = x^2+1 g(x) = x^2+1 What is f(g(2))?
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05/10/19

Crossword help for math
How many quarters are in $72.25
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05/09/19

the area of a rectangle is 156 ft^2 and its length is one foot shorter than its width. What are the dimensions of the rectangle?
the area of a rectangle is 156 ft^2 and its length is one foot shorter than its width. What are the dimensions of the rectangle?
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05/06/19

Find the smallest of three consecutive i there such that the sum of the first and second is 6 more than the third

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04/24/19

2 : 64 : : 4 : ? What will be the value?
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