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Black_prince [1.1K]
4 years ago
12

Which equations would you use the subtraction property of equality to solve? check all thap apply ​

Mathematics
1 answer:
Pavel [41]4 years ago
7 0

Answer:

2,5 and 6

Step-by-step explanation:

you need to find equations that have addition so that you can subtract (using the subtraction property of equality) to isolate the variable. The only ones that have that are the 2nd, 5th and 6th.

The first, you need to use division and for the third and fourth, you use addition. You basically use the inverse/opposite of what it shows. Hope this helps!

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I WILL MARK THE BRAINLIEST!!! One math question. please explain as well
8090 [49]
Surface area of a sphere=4pi(r^2)
Volume of a sphere=(4/3)pi(r^3)
You need to find the r value to calculate surface area, so I'll solve for that first.
(4/3)pi(r^3)=2254pi
(4/3)(r^3)=2254
r^3=1690.5
r=(1690.5)^(1/3), around 11.9126m
Substitute this in to find surface area
A=4pi(r^2)=4pi(11.9126)^2
=1783.2818 m^2
5 0
4 years ago
How do I use elimination process when solving two variable equations?
kenny6666 [7]
Solve simultaneously:

<span>15x-8y=52 and
6x+14y=38
</span>
Let's solve this system thru elimination by addition/subtraction:

Let's get rid of the x terms.
To do this, mult. the first eqn. by -6 and the second by 15.  (This is not the only way in which we can do this!!)  We get  

-90x + 48y = -312
90x   +210y = 570
--------------------------
Add all 3 columns together.  We end up with:

258y = 258, so y = 1.  You can find x by subst. 1 for y in either of the given equations.

If you'd like more help, please be specific about what you want.


7 0
3 years ago
2. QUIT WHILE YOU CAN Smoking has long been connected with serious diseases, such as lung cancer,
den301095 [7]

Using proportions, it is found that the life span of the person would be 14 years, 212 days and 22 hours shorter.

---------------------------

  • 2 packs a day for 35 years is 40 cigarettes a day for 12775 days, as 35 \times 365 = 12775.
  • Thus, a total of 511000 cigarettes, as 40 \times 12775 = 511000.
  • Assuming each cigarette costs 15 minutes of life, the person loses 7665000 minutes of life, as 15 \times 511000 = 7665000

  • One year has 525600 minutes, thus the person loses 14 years of life, as \frac{7665000}{525600} = 14.5833333
  • Looking at the decimal part, the person loses 212 days of life, as 0.5833333 \times 365 = 212.916666655
  • Again looking at the decimal part, 22 hours, as 0.916666655 \times 24 = 22

  • Thus, the person loses 14 years, 212 days and 22 hours of life.

A similar problem is given at brainly.com/question/23352001

6 0
2 years ago
Please simplify this expression
ale4655 [162]
It’s 4R+7

:)))))))))))))))))))
6 0
3 years ago
How do I find the volume of this?
Alinara [238K]

Answer:

Here are the steps to find the volume.

Step-by-step explanation:

  1. Volume = length x width x height.
  2. You only need to know one side to figure out the volume of a cube.
  3. The units of measure for volume are cubic units.
  4. Volume is in three-dimensions.
  5. You can multiply the sides in any order.
  6. Which side you call length, width, or height doesn't matter.
6 0
3 years ago
Read 2 more answers
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