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maw [93]
3 years ago
11

The solution to #68 and #70

Mathematics
1 answer:
atroni [7]3 years ago
8 0
The trick is to write appropriate equations and then solve the system of equations you've created.

"sum of two numbers is -5:"  x + y = -5

"difference                   is  -1:"  x-y = -1

Add these two equations together.  This will cause y to drop out, and you will be left with an equation in x alone:

2x  = - 6, so x = -3.  Subst. -3 for x in either equation, above, and find the corresponding y value.

Then write your solution as (-3, y ) (write in your value for y).
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Pls help me and thank ya!!
algol13

Answer:

Option 1

Step-by-step explanation:

Rational numbers do not have infinite decimals.

Option 1:

-5, 3/4 and √49 are all rational. Correct

√49 = 7

3/4 = 0.75

-5 = -5

Option 2:

1/4 = 0.25

5 = 5

√12 = 3.4641...

Incorrect

Option 3:

-1/2 = -0.5

-3 = -3

√8 = 2.82841...

Incorrect

Option 4:

1/7 = 0.142857...

9 = 9

√11  = 3.31662...

Incorrect

5 0
2 years ago
If 3 dozen cookies require 1 cup of sugar, write a direct variation equation in two variables that represent this situation. Mak
PIT_PIT [208]

Answer:

Step-by-step explanation:

10 multiply 1/3 makes three full cups. Fu*kin* idiot

5 0
3 years ago
Total deviationequals​_______ deviationplus​_______ deviation choose the correct answer below.
Tom [10]
<span>The correct answer is (a) total deviation equals unexplained deviation plus explained deviation.

These deviations are commonly encountered or studied in statistics, and sometimes in regression analysis.</span>
7 0
3 years ago
Read 2 more answers
Please answer this question
SVEN [57.7K]

Answer:

The average rate is 35 miles per hour

Step-by-step explanation:

To get from town A to town B takes 3 hours.  The distance is 100 miles


To get from town B to  town c takes 1 hours.  The distance is 40 miles

To find the average rate , we need to find the total distance and divide by the total time

Total distance = 100 + 40 = 140 miles

Total time = 3 hrs + 1 hr = 4 hours

distance = rate * time

140 miles = rate * 4 hours

140/4 = rate

35 = rate

The average rate is 35 miles per hour

7 0
3 years ago
Explain why 13x +1 = 11x+9​
VLD [36.1K]

Answer:

x=4

Step-by-step explanation:

13x+1 = 11x+9

13x-11x = 9-1

2x = 8

x = 4

5 0
3 years ago
Read 2 more answers
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