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klio [65]
2 years ago
9

-12 -9 (t-3) = 78 t=?

Mathematics
2 answers:
USPshnik [31]2 years ago
8 0

Answer:

equals -43

Step-by-step explanation:

beks73 [17]2 years ago
8 0
-12-9(t-3) = 78
Multiply -9 by t and -3 so:
-9(t-3)
-9t + 27
Now add that back to the equation:
-12 -9t +27 = 78
Now combine -12 and 27:
-12-9t +27 =78
15 -9t = 78
Since 15 is positive ( there is no - sign), we need to subtract 78 by 15:
15 -9t = 78
-15 -15
We subtracted and not added because the opposite of addition is subtraction. Now, we have:
-9t = 63
To find t, we need to divide -9t because we are trying to get t to be alone, so:
-9t = 63
————-
-9t -9t
So now, we have:
t= -7
We have a positive t because a negative divided by a negative is equal to a positive.
So, the answer is :
t = -7
Hope this helps, and would you please rank this brainiest?
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Y= -4x + 10? What is the slope of the line?
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Answer:

-4 or -4/1

Step-by-step explanation:

The equation is in y=mx+b form

m is the slope, and b is the y intercept

So, for this line, y=-4x+10

-4 is the slope and 10 is the y intercept

Hope this helps! :)

6 0
3 years ago
The positive integer k has exactly two positive prime factors, 3 and 7. if k has a total of 6 positive factors, including 1 and
Sav [38]
I think there are two solutions, 63 or 147:

63 = 3² x 7, factors  1 | 3 | 7 | 9 | 21 | 63<span>
147 = 3 x 7</span>², factors 1 | 3 | 7 | 21 | 49 | 147
5 0
2 years ago
The LCM of 12 and 6 is 6. True or False
elena-s [515]

Answer:

false but Least common multiple (LCM) of 6 and 12 is 12.

7 0
3 years ago
Read 2 more answers
The basketball team is selling t-shirts for $9 each. On Monday, they sell 4 t-shirts. On Tuesday, they sell 5 times as many t-sh
blsea [12.9K]
Monday: 9 times 4= 36 dollars 36 times 5 equals 180. So the team earned 180 dollars altogether on Monday and Tuesday
7 0
3 years ago
Read 2 more answers
The weights (to the nearest pound) of some boxes to be shipped are found to be:. Weight 65 68 69 70 71 72 90 95 frequency 1 2 5
Lena [83]
So the mean is 72.97

We need to subtract the mean from each value and square it.
(65-72.97)^2= 63.5209
(68-72.97)^2=24.7009
(69-72.97)^2=15.7609
(70-72.97)^2=8.8209
(71-72.97)^2= 3.8809
(72-72.97)^2=0.9409
(90-72.97)^2=290.0209
(95-72.97)^2=485.3209

Now we add up the new values ( also consider their frequency) and find their mean.
Add the values
63.5209+(2 •24.7009=49.4018)+(5•15.7609=78.8045)+(8•8.8209=70.5672)+(7•3.8809=27.1663)+(3•0.9409=2.8227)+(2•290.0209=580.0418)+(2•485.3209=970.6418)= 1,842.967
Divide by total numburs to find the mean
1,842.967/ 30=61.43223333

The standar deviation is the square root of the mean so is
Square root of 61.43223333=7.837871735
Round to the nearest tenth
Standard Deviation is 7.8



7 0
3 years ago
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