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Aloiza [94]
3 years ago
11

What is 12-11a=45 What is a? 100 points

Mathematics
2 answers:
Evgen [1.6K]3 years ago
4 0

Answer: a = -3

Step-by-step explanation:

Simplifying

12 + -11a = 45

Solving

12 + -11a = 45

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-12' to each side of the equation.

12 + -12 + -11a = 45 + -12

Combine like terms: 12 + -12 = 0

0 + -11a = 45 + -12

-11a = 45 + -12

Combine like terms: 45 + -12 = 33

-11a = 33

Divide each side by '-11'.

a = -3

Simplifying

a = -3

Lelu [443]3 years ago
3 0

Answer:

a=-3

Step-by-step explanation:

-11a=45-12

-11a=33

a= -33/11

a=-3

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opposite= opposite the other angle
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see which sides are involved
in this case it is adjacent and hypotenuse
so A and H
we have to use the SOHCAHTOA rule
Sin=o/h Cos=a/h Tan=o/a
we use cos because a and h are involved
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6 0
2 years ago
Two numbers multiply together to make 8, but add together to make - 6 What are the two numbers?​
Greeley [361]

Answer:

-4 and -2

Step-by-step explanation:

First find all the factors of 8, that would be 1 and 8, -1 and -8, 2 and 4, and -2 and -4.

Then, adding the groups of numbers you have should show you what would equal -6. So 1 + 8 = 9, -1 + (-8) = -9, same vice versa, 2 + 4 = 6, -2 + (-4) = -6. So -2 and -4 would be your two numbers.

8 0
2 years ago
Solve the equation x to the power of 2 = 10
Nadusha1986 [10]

Answer:

The answer is √10,−√10 (award brainliest)

Step-by-step explanation:

Take the root of both sides and solve.

Exact Form:  x  = √10,−√10

Decimal Form:  x  =   3.16227766...,−3.16227766...

for more detailed explanation comment down below this post and ask

8 0
2 years ago
When Tomas simplified the expression -2.6 + (-5.4), he got 2.8. what mistake did Tomas likely make?
vladimir2022 [97]

Tomas used incorrectly the rule of signs, the expression should be simplified as follows:

-2.6 + (-5.4)

-2.6 -5.4 = 8

<h3></h3><h3>What mistake did Tomas likely make?</h3>

Here Tomas wants to perform an addition between two numbers:

-2.6 + (-5.4)

And the outcome that Tomas gets is:

-2.6 + (-5.4) = 2.8

Here his mistake seems to bee that he thought the second number was a positive number, and he solved the operation:

-2.6 + 5.4

So, he used wrong the rule of signs.

Remember that the rule of signs says that:

(-)*(+) = (+)*(-) = (-)

Using that, we can rewrite the original expression:

-2.6 + (-5.4)

to:

-2.6 - 5.4

Solving that, we get:

-2.6 - 5.4 = -8

Which is the outcome that Tomas would have gotten if he had used correctly the rule of signs.

If you want to learn more about the rule of signs:

brainly.com/question/13333620

#SPJ1

5 0
1 year ago
A theater has 1200 seats. each row has 20 seats. what is the equation to find the number of rows in the theater
Ugo [173]
Let be x the number of rows
there are 1200 seats, and each row has 20seats
so 20x=1200, so x= 60, there are 60 rows in the theater
6 0
3 years ago
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