Solve the system of linear equations by adding or subtracting - 6x+y=5 7x-y=-4

3. In a triangle, two angles have measures of 45° and 85°. What is the measure of the third angle in this triangle?

When a biologist wishes to estimate the mean time that such sharks stay immobile by inducing tonic immobility in each of a sample of 12 sharks, find the probability that mean time of immobility in the sample will be between 10 and 13 minutes?

Find x x+4+8x-6+13x-21=180

Which of the following statements is false? Select all that apply. All trapezoids are parallelograms. All parallelograms are trapezoids. All squares are rectangles. All rhombuses are rectangles. All rectangles are squares.

One cubic feet of sand wounds 100 lbs. A square sandbox with 5 foot sides had half of a foot of sand in it. How many lbs of sand is in the sandbox?

Can anyone solve this equation 8x-19 = - 4-7x

How do i solve the sum of three consecutive integers is 48 less than twice the smallest of the three integers?

Bicycles have 2 wheels an tricycles have 3. There are a total of 7 bicycles and tricycle. If there are 17 wheels in all how many bicycles are there?

Least to greatest - 2/5 - 2.47 - 2 1/2 5 21/4

What times itself equals 512