Choose the property of addition that justifies the equation.

Mathematics

1 answer:

Studentka2010 [4]3 years ago

6 0

Answer:

Associative

Step-by-step explanation:

Associative property is the one that says that when 3 or more numbers are summed, the grouping of such numbers has no effect on the result of the sum. It is:

(a + b) + c = a + (b + c) for every a, b and c real numbers.

You might be interested in

How do you figure out the discount for something that is $134 tax 13% and is 50% off??

alukav5142 [94]

mult .13 with 134

add that to 134

then divide by 2 then that should be your answer

8 0

2 years ago

Read 2 more answers

Weights of the vegetables in a field are normally distributed. From a sample Carl Cornfield determines the mean weight of a box

pantera1 [17]

To find the z-score for a weight of 196 oz., use

$z=\frac{x-\mu}{\sigma}=\frac{196-180}{8}=\frac{16}{8}=2$

A table for the cumulative distribution function for the normal distribution (see picture) gives the area 0.9772 BELOW the z-score z = 2. Carl is wondering about the percentage of boxes with weights ABOVE z = 2. The total area under the normal curve is 1, so subtract .9772 from 1.0000.

1.0000 - .9772 = 0.0228, so about 2.3% of the boxes will weigh more than 196 oz.

7 0

3 years ago

What is 7.8×10^5 hours in days?

Serhud [2]

Since one day has 24 hours....,

; To find the number of days in (7.8 × 10^5)hrs...just divide the hours by 24 hours

; (7.8 × 10^5)÷ 24

; 32 500 days

4 0

3 years ago

What ordered pair would be located 5 units to the right on the x-axis?

Akimi4 [234]

Answer:

(5, 0)

Step-by-step explanation:

The ordered pair located 5 units to the right on the x axis is (5, 0) which indicates the x-location first (x = 5) and the y-location in the second coordinate (y = 0)

8 0

2 years ago

2X + 5y = -13<br> 3x - 4y = -8

almond37 [142]

Answer:

You will need to use simultaneous equations.

Method:

First we need to make one set of variable the same, in this case we will:

-Multiply the top equation by 3 to get 6x
-Multiply the bottom equation by 2 to get 6x

The result will be as follows:

1) 2x+5y=-13 x3
1) 6x+15y=-39

2) 3x-4y=-8 x2
2) 6x-8y=-16

Now we will make both equations equal to 6x:

1) 6x=-15y-39
2) 6x=8y-16

Now because they both equal 6x, they therefore equal each other:

-15y-39=8y-16
-23=23y
y=-1

Now that we have y, we can substitute it back into one of the equations to get x:

1) 2x+5(-1)=-13
2x-5=-13
2x=-8
x=-4

3 0

3 years ago