3 years ago

Solve 5x – 1 = 3x – 15. Explain each step, and include the Properties of Equality that you used.

Mathematics

1 answer:

artcher [175]3 years ago

7 0

5x – 1 = 3x – 15

Subtraction Property of Equality (Subtract 3x from both sides)

2x - 1 = -15

Addition Property of Equality (Add 1 to both sides)

2x = - 14

Division Property of Equality (Divide both sides by 2)

x = -7

You might be interested in

Can someone please explain this

SSSSS [86.1K]

Answer:

-1

Step-by-step explanation:

can you also hep me on something

4 0

3 years ago

The average of your first 6 tests is 82. If your test average after your seventh test is an 80.5, what did you score on the seve

mart [117]

So average is of the first 6 tests is 82 well that means

(test1 + test2+ test3+ test4 + test5+test6)/6 = 82

so now let do some cross multiplliying

test1 + test2 + test3 + test 4 + test5 +test6 = 82*6

test1 + test2 + test3 + test 4 + test5 +test6 = 492

now lets see if we can find that 7th test score

(test1 + test2 + test3 + test4 + test5 +test6 + test7)/7 = 80.5

So look we found test1 + test2 + test3 + test4 + test5 +test6 to be 492 so lets substitute.

(492 + test7 )/7 = 80.5

test7 = (80.5*7)-492 = 71.5

7 0

2 years ago

What is the mass of a cylinder of lead with a radius of 2 centimeters and a height of 6 centimeters, given that the density of l

ycow [4]

The mass of lead cylinder is: 859.10 grams

Step-by-step explanation:

In order to find the mass of a cylinder we have to find the volume first

Given

Radius = r = 2 cm

Height = h = 6 cm

The volume of cylinder is given by:

$V = \pi r^2h$