2 years ago

–4x-2y=-2 x-2y=9 what do you get if you subtract the second from the first

Mathematics

1 answer:

kirill115 [55]2 years ago

7 0

Answer:

-4×-2y=2

-4×+8y=-8

6y=6

y=1 then you the value of y and to put in any one equestion

You might be interested in

What is the radius of 22cm of a circle

algol13

Answer:

11 cm

Step-by-step explanation:

To find radius just divide diameter of 22 by 2. The answer will be 11.

4 0

2 years ago

Read 2 more answers

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,

REY [17]

Answer:

a) 217

b) 1351

c) 5403

Step-by-step explanation:

Given that:

confidence interval (c) = 0.95

$\alpha =1-0.95=0.05\\\frac{\alpha }{2} =\frac{0.05}{2}=0.025$

The Z score of $\frac{\alpha }{2}$ is from the z table is given as:

$Z_{\frac{\alpha }{2} }=Z_{0.025}=1.96$

Range = $45000 - $30000 = $15000

The standard deviation (σ) is given as:

$\sigma=\frac{Range}{4} =\frac{15000}{4}=3750$

Sample size (n) is given as:

$n=(\frac{Z_{\frac{\alpha}{2} }\sigma}{E} )^2$

a) E = $500

$n=(\frac{Z_{\frac{\alpha}{2} }\sigma}{E} )^2= (\frac{1.96*3750}{500} )^2$ ≈ 217

b) $n=(\frac{Z_{\frac{\alpha}{2} }\sigma}{E} )^2= (\frac{1.96*3750}{200} )^2$ ≈ 1351

c) $n=(\frac{Z_{\frac{\alpha}{2} }\sigma}{E} )^2= (\frac{1.96*3750}{100} )^2$ ≈ 5403

7 0

3 years ago

Read 2 more answers

Answer ASAP!! Please! Will give brainliest!

ale4655 [162]

This is what you’re looking for !

7 0

3 years ago

Happy veterans day everybody!!!

Serjik [45]

Answer:

happy vets day

Step-by-step explanation:

4 0

3 years ago

a man uses 60 litre of petrol for a journey of 750 km how many litres will be used for a journey of 350 km

andrew11 [14]

Answer:

28 litres

Step-by-step explanation:

60l/750km = .08

.08 litres used per kilometer

.08*350km = 28l

6 0

3 years ago

Read 2 more answers