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astra-53 [7]
2 years ago
5

You can eliminate one of the variable terms in an ___ by adding or subtracting another equation

Mathematics
1 answer:
MakcuM [25]2 years ago
8 0

Answer:

system of equations

Step-by-step explanation:

You can eliminate one of the variable terms in a <u>system of equations</u> by adding or subtracting another equation.

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Anyone know this one?
SSSSS [86.1K]

Answer is a because a^-2 will be changed to 1/a^2

Hope that helps

5 0
3 years ago
Find two numbers such that the sum of the first and three times the second is 5 and the sum of the second and two times the firs
Sav [38]

Answer:

first number= 19/5

second number= 2/5

Step-by-step explanation:

first number= a

second number= b

a+3b=5   equation 1

b+2a=8  equation 2

using equation 2 we have

b=8-2a

using equation 1 we have

a+3(8-2a)=5  

a+24-6a=5

24-5=6a-a

19=5a

a=19/5 = first number

so using b=8-2a

we have

b=8-2(19/5)

b=8-(38/5)

b=2/5 = second number

4 0
3 years ago
State the number of real zeros and what they are for "3x^2+5x-2" pleas help me:'(
Lady bird [3.3K]
This can be solved by factoring.

First, set the expression equal to zero.

3x^2+5x-2=0

Then, find two the factors of  ac whose sum is b.

6, -1

Split b into these two factors.

3x^2+6x-x-2=0

Next, factor by grouping.

3x(x+2)-1(x+2) = (3x-1)(x+2) = 0

By the Zero Product Property, set each factor equal to zero.

3x-1 = 0 \\ x = 1/3

x+2=0 \\ x = -2

These are the solutions. The Complex Conjugate Root Theorem and the Fundamental Theorem of Algebra both state that, in essence, real and imaginary solutions come in pairs of two and every polynomial of degree n has exactly n complex roots, but real roots are also complex roots. That sounds confusing, but this just means that you're done. Your answers are -2 and 1/3. There are two real roots.
3 0
3 years ago
Which expression means 7 more than a number?
Kisachek [45]
The answer is B 

- <span>"More" means added to, or addition. So 7 more than 'A number' is: </span><span>d + 7</span>
4 0
3 years ago
3.(4+5) is how much more than 3.4+5?
kifflom [539]

Answer:10 more

Step-by-step explanation:

distributive property so 3*4+3*5 so 12 an 15 or 27.  3*4+5 is 12+5 so 17  27-17 is 10

5 0
3 years ago
Read 2 more answers
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