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Gnom [1K]
3 years ago
6

Please help me

Mathematics
2 answers:
Papessa [141]3 years ago
7 0
The answer will be true.
Rzqust [24]3 years ago
7 0

The answer is true. This was just on my quiz and I know its correct.

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Solve the system by either elimination or substitution
Alex_Xolod [135]
The correct answer is A: x=2 and y=-3. Either method would work, but for example, let's use elimination. If you multiply the second equation by 5, you get: 10x +5y = 5. When you add both equations, you can then cross out both y terms. You are left with one equation that reads: 13x=26. Solving for x gives you 2. You can substitute 2 in for x in either equation and you will receive -3 for your y value.
5 0
3 years ago
A rectangle has vertices (r,t) , (r,s) and (t,t). find the fourth vertex
Andrej [43]

Answer:

(t,s)

Step-by-step explanation:

this point has the x value t and the y value s that is missing.

4 0
3 years ago
A grocer has two kinds of tea, one selling for 80 cents per pound and the other selling for 60 cents per pound. How many pounds
ruslelena [56]
X*80+y*60= 50*74
x      +y      =50            | * ( -60)

80x  + 60y= 50*74
-60x  - 60y=-50*60
---------------------------
20x= 50*(74-60)=50*14
x=50*14/20=35 pounds of 80 cents tea
y=50-35=15 pounds of 60 cents tea
8 0
3 years ago
Please help!!!! Chris is a fitness instructor.
dmitriy555 [2]

Answer:

i think its d

Step-by-step explanation:

3 0
3 years ago
A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa
swat32
All our answers lie in the above statement.

Confidence Level:
The creator claims that 9 out 10 students will have the average score in the said range. Or in other words we can say that the creator is 90% confident about the result of the field test. So the confidence level is 90%. 

Margin of Error:
The average score lies within 4% of 70%. This means the margin of error is 4% i.e. the average scores can deviate from 70% by 4% .

Confidence Interval:
Lower Limit = 70% - 4% = 66%
Upper Limit = 70% + 4% = 74%

Interpretation:
The exam creator is 90% confident that the average scores of seniors will be between 66% and 74%. 
4 0
3 years ago
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