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Savatey [412]
3 years ago
9

Solve the expresssion x − 5 = 17

Mathematics
1 answer:
CaHeK987 [17]3 years ago
7 0

Answer: x = 22

Step-by-step explanation:

We must isolate the x by itself.

We need to add 5 to both sides of the equation so it cancel out from the side with x.

So x = 22

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What is the first step in evaluating the expression below?
Ostrovityanka [42]

Answer:

brackets, then Parenthesis then the FIRST Multiplication then the division and then math and sub and so on a so for

Step-by-step explanation:

6 0
3 years ago
If x+a is a factor of 2x²+2ax+5x+10,find a.
vazorg [7]

If x+a is a factor of the polynomial, it means that -a is a root of the polynomial.

In fact, if a polynomial p(x) has a root x_0 (i.e. p(x_0)=0), then the polynomial is divisible by (x-x_0)

In your case, you know that the polynomial is divisible by (x+a)=(x-(-a)), so -a is a solution.

Let's evaluate p(-a) and set it to zero:

2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2

We can check the answer: if a=2 the polynomial becomes

2x^2+2(2)x+5x+10 = 2x^2+9x+10

And we're claiming that -a=-2 is a root of this polynomial:

2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0

5 0
3 years ago
What is a rational number
Murrr4er [49]

Answer:

Rational numbers are numbers that can be written as fractions, unlike π, which never ends and cannot be expressed as a fraction.

I am joyous to assist you anytime.

8 0
3 years ago
What is the length of line RS? I don't understand how to get it.
romanna [79]

The way to get the length of RS is actually very simple. You see how there is a number 17 in the line? You take that and it should mean every area where a line should be is 17. So, R is 17, the 2nd line is 17, M is 17, the 4th line is 17, and S is 17. So you then multiply 17 times 5 and get 85.

-Mabel <3

(Sorry if this is incorrect! <3)

8 0
3 years ago
Negative eleven times positive 8 equals
Alex73 [517]

Answer:

-11 x 8 = -88

Step-by-step explanation:

negative times positive = negative

negative times negative = positive

positive times positive = positive

7 0
3 years ago
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