Chapter 14: Problem 1
Identify each equation as an ellipse or a hyperbola. $$\frac{x^{2}}{36}+\frac{y^{2}}{4}=1$$
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These are the key concepts you need to understand to accurately answer the question.
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Chapter 14: Problem 1
Identify each equation as an ellipse or a hyperbola. $$\frac{x^{2}}{36}+\frac{y^{2}}{4}=1$$
These are the key concepts you need to understand to accurately answer the question.
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The top three Mother's Day gifts are flowers, jewelry, and gift certificates. The total of the average amounts spent on these gifts is \(\$ 53.42 .\) The average amount spent on jewelry is \(\$ 4.40\) more than the average amount spent on gift certificates. Together, the average amounts spent on flowers and gift certificates is \(\$ 15.58\) more than the average amount spent on jewelry. (Source: BIG research) What is the average amount spent on each type of gift?
The three foreign countries from which the largest number of children were adopted in 2009 were China, Ethiopia, and Russia. A total of 6864 children were adopted from these countries. The number of children adopted from China was 862 fewer than the total number adopted from Ethiopia and Russia. Twice the number adopted from Russia is 171 more than the number adopted from China. (Source: U.S. Department of State) Find the number of children adopted from each country.
In a group of 100 adults, 70 say they are most likely to do spring housecleaning in March, April, or May. Of these 70 , the number who clean in April is 14 more than the total number who clean in March and May. The total number who clean in April and May is 2 more than three times the number who clean in March. (Source: Zoomerang online survey) Find the number who clean in each month. (THE IMAGES CANNOT COPY)
Four solutions of the equation \(y=a x^{3}+b x^{2}+c x+d\) are given. Use a system of four equations in four variables to find the constants a, \(b, c,\) and \(d\) and write the equation. $$(-2,-39),(-1,-12),(1,-6), \text { and }(3,16)$$
Solve the system of equations. $$\begin{aligned} x-y+2 z &=-3 \\ x+2 y+3 z &=4 \\ 2 x+y+z &=-3 \end{aligned}$$
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