4 years ago

Solutions to these equations??

Mathematics

2 answers:

madam [21]4 years ago

5 0

1)x= +3, -3
2)x= +8, -8
3)x= 2

Akimi4 [234]4 years ago

3 0

X = 4.5
x^2=64, X = 7
x=2

You might be interested in

Will 50,48 and 14 form a right triangle

alexgriva [62]

Right triangles add up to 90 degrees

50+48+14=112 degrees

So no

8 0

3 years ago

Read 2 more answers

A special variety of wallpaper covers only 60 square feet per roll. How many single rolls are needed to paper a room measuring 1

Ganezh [65]

Answer:

9 rolls

Step-by-step explanation:

The perimeter of the room measures 2(19' +12') = 62', so the area of the walls is ...

(62 ft)(8.5 ft) = 527 ft²

We know that 8 rolls will cover 8×60 ft² = 480 ft², and 9 rolls will cover 540 ft², so we will need 9 rolls to cover the walls.

7 0

3 years ago

Suppose that a random sample of 50 bottles of a particular brand of cough syrup is selected and the alcohol content of each bott

timofeeve [1]

Answer:

95% confidence interval will be narrower.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 50

95% confidence interval for average alcohol content:

$(7.8, 9.4)$

a) 90% confidence interval

If we calculate a 90% confidence interval, then the confidence interval become narrower because we decreased the confidence percentage.

This would decrease the margin of error.

Hence, the confidence interval become narrower.

6 0

3 years ago

Help please I really don’t understand this

SashulF [63]

Answer:

78.5/250 = 31.4%

Step-by-step explanation:

divide the area of the circle (which is 25π = 78.5 sq in) by the area of the rectangle (which is 25x10 = 250 sq in)

4 0

3 years ago

Paul owes Paula 35 cents and has a pocket full of 55-cent coins, 10-cent coins, and 25-cent coins that he can use to pay her. Wh

dolphi86 [110]

3
he could use:
1x55 cent coin
1x10 + 1x25 cent coins
4x10 cent coins

4-1=3

8 0

3 years ago

Read 2 more answers