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Contact [7]
3 years ago
10

Solve the system (picture) by substitution

Mathematics
1 answer:
Westkost [7]3 years ago
6 0
Try out all of your options by filling the the x and y values from each option. You can use either of the two equations to solve

1) 2(2)+3(3) does not equal 5
2) 2(3)+3(2) does not equal 5
3) 2(3)+3(-2) does not equal 5
4) 2(-2)+3(3) equals 5
4.5) Double check your answer by doing the same thing for the second equation // 3(-2)+2(3) does equal zero.

D
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Solve for x over the complex numbers.
Grace [21]

Answer:


Step-by-step explanation:

Given x^2+4x+13=0, find the complex roots.  The best approach here is to use the quadratic formula.  Note that a = 1, b = 4 and c = 13.  

Thus, the discriminant, b^2 - 4ac, is (4)^2 - 4(1)(13) = 16 - 52 = -36, and the square root of that is plus or minus i√36, or  plus or minus 6i.  


plus or minus i√

8 0
3 years ago
Read 2 more answers
both commensalism and parasitism are relationships that benefit at least one species. which of the following describes the effec
scoundrel [369]

Answer:

C) Commensalism has no effect on the species, while parasitism has a negative effect.

Explanation:

Commensalism and parasitism are both forms of species interaction.

Commensalism:

Commensalism refers to an ecological relationship between two species where one species benefits from the other but the other is neither harmed nor benefited. For example, remoras are little fish that attach to sharks and other larger fish. Remoras benefit in terms of protection, transport and food. They feed off scraps attached to the shark's mouth and teeth. However, the shark neither benefits nor suffers from this interaction.

Parasitism:

Parasitism is a relationship between a host and a parasite where the parasite benefits at the expense of the host. the parasite attains benefits while harming the host. For example, ticks and fleas that infest dogs. The ticks attain nutrients from the host's blood and in turn, weaken and harm the host.

6 0
3 years ago
State the type of hypothesis test to be used in the following situation: Researchers hoped to determine whether time spent watch
Vikki [24]

Answer:

t-test for difference in slopes

no association exists

Step-by-step explanation:

t-test can be used to determine signifiance in difference in slopes of of fit vs time and not fit vs time graph

The data shows that as number of hours spent watchnig television increases, there is no increasing or decreasing trend in number of people fit or not fit. The number of people fit or not fit seems to be distributed around 629 for 1-2 hours of watching television. There trend is not consistent in both cases with increasing number of hours

7 0
3 years ago
I need to find the value of k
VladimirAG [237]
Hey there! :D

-2(k-2)≥-20

Distribute the -2. Multiply -2 by k and -2. 

-2k+4≥-20

Subtract 4 on both sides. 

-2k≥-24

Divide by -2 and flip the sign, since you are dividing by a negative. 

k≤12

I hope this helps!
~kaikers 
8 0
3 years ago
Read 2 more answers
Which expression is equivalent to 15 n=10 (n+3/n)?
Karolina [17]

Answer:

±√6

Step-by-step explanation:

15n=10(n+\frac{3}{n} ) is your expression first muiltiply out the 10 to get 15n= 10n+10 3/n next subtract  10 n from both sides to get 5n=10+3/n multiply both sides by n to get 5n^2=13 combine both sides and use the quadratic equation to solve to get your solution of ±√6

3 0
3 years ago
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