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3 years ago

HELP ASAP-2x+5y=-15 5x+2y=-6 How would you solve this system using elimination?

Mathematics

2 answers:

ale4655 [162]3 years ago

8 0

Answer:

2 and 3

Step-by-step explanation:

Marianna [84]3 years ago

6 0

Do the second one or the third one and then eliminate

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If trapezoid ANCD was reflected over the y axis reflected over the x axis and rotates 180 degrees where would point A lie

Vlad [161]

Point a would lie at the same point from the beginning.
EXPLANATION
say point a is x,y. Reflecting over the y axis makes it -x, y. Reflecting over the x axis makes it -x, -y. Finally rotating it 180 degrees would make it x,y, the same spot as in the beginning.

6 0

3 years ago

A data set includes 103 body temperatures of healthy adult humans for which x= 98.1 and s = 0.56.

lutik1710 [3]

Answer:

98.1, No does not contain, yes contains.

Step-by-step explanation:

Given that

sample size n =103

Sample mean = 98.1

sample std dev s = 0.56

a) the best point estimate of the mean body temperature of all healthy humans = sample mean =98.1

b) 99% confidence interval estimate of the mean body temperature of all healthy humans

We can use Z critical since sample size is large though sigma is not known

99% CI = $(98.1-\frac{0.56}{\sqrt{103} },98.1+\frac{0.56}{\sqrt{103} } )\\=(98.045, 98.155)$

This does not contain 98.6

This sample does not represent the population, i.e. may be biased sample.

c) CI of population mean

= populaiton mean + /- margin of error

=(98.545, 98.656)

Yes contains 98.6

5 0

3 years ago

First answer gets brainliest

andrew11 [14]

Beep bop I’m a beginner and need this

Hshaks jdlsmavsusksns those were so that you would reach the answer minimum of 20 characters

3 0

3 years ago

Read 2 more answers

Which expression has the same value as -18/(-9)?

jekas [21]

2 would be -18/-9. I’m not sure which expressions are provided.

8 0

4 years ago

1. Parker paid $4.50 for three pounds of gummy candy. Assuming each pound of gummy candy costs the same amount, complete the tab

Lunna [17]

Answer:

1: $1.50

2: $3.00

4: $6.00

5: $7.50

6: $9.00

7: $10.50

8: $12.00

9: $13.50

Step-by-step explanation: To answer this problem you need to divide $4.50 by 3. When you do that you get $1.50 per pound of gummy bears. Then you can either add $1.50 to each amount or multiple them by the x value. Then graph the numbers you get.

4 0

3 years ago