A) find the value of 2x+y wehn x =4 and y =3 b) find the value of a^2 + b when a = -2 and b = 5

Mathematics

1 answer:

Reil [10]2 years ago

6 0

Answer:

Solution,

a. Given,

X=4

y=3

Now,

 $2x + y \\ = 2 \times 4 + 3 \\ = 8 + 3 \\ = 11$ 

b. Given,

a=-2

b=5

Now,

 ${a}^{2} + b \\ = {( - 2)}^{2} + 5 \\ = 4 + 5 \\ = 9$ 

hope this helps...

Good luck on your assignment..

You might be interested in

If you are going to reach into a bag and pull out a gum ball at random what color are u most likely going to get

Airida [17]

Answer: pink

Step-by-step explanation: bubblegum

7 0

2 years ago

ILL GIVE BRAINLIEST

weqwewe [10]

Answer:

See below

Step-by-step explanation:

I'll provide an example to help you. Let's say we were solving $x^2+5x-7=0$ and we wanted to factor the quadratic on the left side. We can't do that because the factors of -7 don't add up to 5. So we'd have to use the quadratic formula. The quadratic formula is essentially the last resort that will solve all quadratic equations, so it could be seen as a preferred method. But, unless you can factor the quadratic, it's much easier to solve.

Now let's do another one. $x^2+5x+6=0$ for example can be written as $(x+2)(x+3)=0$ and we can easily get $x=-2$ and $x=-3$ as solutions since plugging them into the factors would produce 0 (from the Zero Product Property). If we used the quadratic formula, it would take more time to plug in the variables and solve when we can just simply factor.