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Bumek [7]
4 years ago
13

Check all of the following that are solutions to the system shown below.

Mathematics
1 answer:
loris [4]4 years ago
5 0
From second equation y = -2-x

Plug this into the first equation:-

- 2 - x = -x^2 - x + 2

x^2 + x - 2 - 2 - x = 0

x^2 - 4 = 0

x^2 = 4

x + +/- 2

Plug these values into x + y = -2 :-
x = 2:- 
2 + y = -2   

so y = -4 

so one solution is (2,-4)

Now try x = -2

- 2 + y = -2

y = 0 

so the second solution is ( -2 , 0)

So A and C  are correct
You might be interested in
________is a ratio comparing two quantities with different kinds of units
V125BC [204]

Answer:

Rate

Step-by-step explanation:

Rate is basically also a ratio. but it is the comparing of two different quantities with different units.

As ratio is comparing of same or identical quantities thus it has no units. But on the other hand as rate is the comparison of different quantities, thus it has units.

for example:

When i compare two quantities, 1st is a distance quantity and 2nd is a time quantity i.e.

20 meters : 15 seconds

thus the lowest form of this relationship will be:

4 meters : 3 seconds

when i write it in Decimal form it becomes :

Ans : 1.33 meters/second   (Distance per unit time)

As this ratio have remaining units thus it is referred to as "RATE".

5 0
4 years ago
Read 2 more answers
A road is 5.5 kilometers long.<br><br> How many centimeters long is it?
mihalych1998 [28]
1 km= 100,000 cm
5.5km x 100,000 = 550,000 cm

Hope this helps
3 0
3 years ago
If the number n satisfies the relationship n&gt;0 what are inequalities that represent this 1/n
castortr0y [4]
Ok let's understand the question.
We want to know what values we get when n is positive in 1/n.
We get the values
0<1/n≤1
If we plug in 1: 1/1 = 1
2: 1/2 = .5
100: 1/100 = .01
10000000 = 1/10000000 = Small number close to 0.
n will always be more than 1 by the given (n>0).

6 0
3 years ago
What is 5 7/8 minus 2 9/10?
Alexus [3.1K]

5 7/8 - 2 9/10

we can make 5 7/8 into an improper fraction of 47/8

we can also make 2 9/10 into an improper fraction of 29/10

find a common multiple between the denominators 10 and 8 - the smallest would be 40

47/8 will be made into 235/40

29/10 will be made into 116/40

235/40 - 116/40 = 119/40

simplify 119/40 and you get 2 39/40

decimal form is 2.975

3 0
3 years ago
Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste p
sleet_krkn [62]

Answer:

Convenience sampling.

Step-by-step explanation:

In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.

There are various types of sampling used by researchers and these are;

1. Random sampling.

2. Systematic sampling.

3. Stratified sampling.

4. Cluster sampling.

5. Quota sampling.

6. Convenience (opportunity) sampling.

Convenience sample can be defined as a sampling technique in which the representatives to be used are easily accessible. For example, a researcher using a social media poll such as Twitter polls.

In this scenario, Catherine Chao, Director of Marketing Research, chooses thirty-six of her closest friends to participate in the testing of a new toothpaste package. Thus, Catherine's sample is a convenience sampling.

4 0
3 years ago
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