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4 years ago

Need help on this ASAP pls & thx

Mathematics

2 answers:

Kobotan [32]4 years ago

7 0

C. the solutions are where the lines cross

Snezhnost [94]4 years ago

3 0

Answer:

C. $(2,0)(0,-4)$

Step-by-step explanation:

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How do I solve this?

Artemon [7]

a^2 - b^2 = (a + b)(a - b)

In this case

49x^4y^2 - 4z^2

= (7x^2y)^2 - (2z)^2

= (7x^2y + 2z)(7x^2y - 2z)

Factors are (7x^2y + 2z) and (7x^2y - 2z)

Answer:

D) 7x^2y + 2z

8 0

3 years ago

A survey of 25 grocery stores revealed that the mean price of a gallon of milk was $2.98, with a standard error of $0.10. What i

Gnesinka [82]

Answer:

95% confidence interval: (2.784,3.176)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 25

Sample mean = $2.98

Standard error = $0.10

Alpha = 0.05

95% confidence interval:

$\mu \pm z_{critical}(\text{Standard error})$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$2.98 \pm 1.96(0.10) = 2.98 \pm 0.196 = (2.784,3.176)$

5 0

3 years ago

Mr. Sweeney's car can travel 195 miles on 10 gallons of gas. How far

VikaD [51]

Answer:

Miles in 10 gallons = 195

Miles in 1 gallon = 195/10 = 19.5

Miles in 18 gallons = 19.5 × 18 = 351 miles.

6 0

3 years ago

Read 2 more answers

Angie has already written 19 pages, and she expects to write 1 page for every additional

marta [7]

Answer:

$9$

Step-by-step explanation:

$28 - 19 = 9$

7 0

3 years ago

Read 2 more answers

Which number line represents the solution |2x|-12 =

Bond [772]

Answer:

Third option, last one

Step-by-step explanation:

Let's solve for x first.

|2x| - 12 = -2

|2x| = 10

2x = 10 or -2x = 10

x = 5 or x = -5

The number line that represents this is the last one.

3 0

3 years ago