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Gwen R.'s Resources

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Two numbers, a and b, are added together and the sum is negative (less than zero). So ONE or BOTH NUMBERS must be negative. If a is negative, b can be either positive or negative. But maybe a is positive, and b negative? What if they are BOTH negative? Knowing this, which choice ALWAYS works? a...

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Can you identify what kind of problem this is? Let's think together.....she has LOTS of different kinds of fish. We know that some are guppies and others are testras and still others that we know nothing about. We don't know what kind and we don't know how many. Let's think about what we DO...

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We need the average of 12 items and we only know 11 of them. Let's add them:   10 + 10 + 10 + 10 + 8 + 8 + 8+ 8 + 12 + 12 + 11 + y =  sum   107 is the sum of 11 items, and the average is 9.7. Let's guess...

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The formula is √(x1 -x2)2 + (y1-y2)2     or you could graph it, complete the right triangle and use the Pythagorean theorem.   (?)2 + (-?)2 = 1/25 + 4/25 =5/25 = ? or .2 units   √.2 = .45 units   

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1600 contains 160 $10 dollar bills.  Take $3 out of each.  160 x 3 = 480    So he took a total of $480 to divide among 4 employees, so each got $160

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All you know the the length of the sides of the triangle so you need to use Heron’s Formula which is a method for calculating the area of a triangle when you know the lengths of all three sides but not the height.    A = √p(p-a)(p-b)(p-c) where p is half the perimeter...

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You can distribute or use FOIL (First, Outer, Inner Last)         x + 2         x + 2               2x + 4 x2+2x        x2 +4x +4     answer     (x...

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Slope is change in y over change in x. Look at the two points;   P1 has a y-value of  -4 P2 has a y-value of +4   The change in y is 8 units!  Think: what's the difference between -4 and +4?   Or, thing what's the distance on the number...

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Intercept is like intersection; the point where streets cross, or where lines cross. The axes are lines also.    The x- intercept is the value of x in the point (x,0)       The y- intercept is the value of y in that point (0,y)   Think about what...

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Isosceles right triangle has area 5400 sq ft   Sides are in the ratio 1:1:√2   Let x be the length of a side. The altitude is x√3   5400 =    ½ (x)(x√3)   2700/(√3

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