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aev [14]
3 years ago
12

Which expression represents the sum of 59 and x?

Mathematics
1 answer:
horsena [70]3 years ago
5 0

Answer:

A.   59 + x

Step-by-step explanation:

sum of 59 and x

59 + x

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The average of eight numbers is 56. When one of the numbers was left out, the mean decreased to 54. What number was left out?
lozanna [386]

Step-by-step explanation:

Given the average of 8 numbers = 56.

Then the Total sum of 8 numbers = 56 * 8

                                                        = 448.

Sum of 1st three numbers = 49 + 57 + 72

                                           = 178.

So, the total = 448 - 178

                    = 270.

Average of the other 5 numbers = 270/5

                                                      = 54.

Verification:

178 + 270 = 448/8

                = 56.

5 0
2 years ago
Solve the system using the substitution method <br> 4x+6y=8<br> 3x+y=9
stepladder [879]
4x+6y=8
3x+y=9

y = 9 - 3x

4x + 6( 9-3x ) = 8
4x + 54 - 18x = 8
14x = 46
x = 23/7

y = 9 - 3(23/7)
y = 9 - 69/7
y = - 6/7
4 0
3 years ago
determine whether AB and CD are parallel, perpendicular,or neither. A(-1,-4), B(2,11), C(1,1), D(4,10)
sergiy2304 [10]

Step-by-step explanation:

the x distance from A to B is 3 (from -1 to 2), and the y distance is 15 (from -4 to 11).

the x distance from C to D is also 3 (from 1 to 4), but the y distance is 9 (from 1 to 10).

so, the slopes are different

AB : 15/3 = 5

CD : 9/3 = 3

and the lines are therefore not parallel.

perpendicular slopes are simply inverting y and x in the ratio and flip the sign (from - to + and vice versa). but that is not the case here either (just to start - both slopes are positive).

so, the 2 lines are "neither".

3 0
3 years ago
Olivia hikes at a consistent rate of 3 mph. If she hikes for 6 hours, how far will she have traveled?
Step2247 [10]
We can use the distance = rate times time formula.

This formula states that if you travel at a constant rate for a certain amount of time, you will know the distance that you traveled.

We know the rate is 3 mph and she hiked for 6 hours.

distance = 3 * 6
distance = 18

So, she traveled 18 miles.


4 0
4 years ago
Read 2 more answers
In the Cerner a magnitude 7.9 earthquake struck California. In another year a magnitude 5.9 quick struck Kansas How many times a
katen-ka-za [31]

Answer:

2

Step-by-step explanation:

7.9-5.9= 2.0 the answer would be 2

3 0
3 years ago
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