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3 years ago

Enter a number in the space provided to make the equation true.

Mathematics

2 answers:

worty [1.4K]3 years ago

8 0

4.5
5 - 9.5 = 4.5 so 5 + 4.5 = 9.5

inna [77]3 years ago

6 0

Answer:

4.5

Step-by-step explanation:

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1. How do you define quadratic equations?

oksian1 [2.3K]

Answer:

$ax^{2} +bx+c^{2}=0$

Step-by-step explanation:

A quadratic equation is a equation that takes the form: $ax^{2} +bx+c^{2} = 0$

Ex. Using our definition of quadratic equations, $ax^{2} +bx+c^{2}=0$ ,

We can set a = 2, b = 1, c = 6:

$2x^{2} +x+6^{2}=0$

$2x^{2} +x+36=0$

Which can then be solved (if you are trying to solve it) as:

$(2x+9)(x-8)=0$

$x=\frac{9}{2}, 8$

6 0

3 years ago

I'LL MARK BRAINLIEST !!!

V125BC [204]

Answer:

it is 5 if im not mistaken

5 0

3 years ago

In triangle ABC, a = 9, c = 5, and B = 120°. Find b2.

anygoal [31]

Answer:

(D) $b^2=151$

Step-by-step explanation:

Given: In triangle ABC, a=9, c=5 and ∠B=120°.

To find: The value of $b^2$ .

solution: It is given that In triangle ABC, a=9, c=5 and ∠B=120°.

Now, using the law of cosines, we get

$b^2=a^2+c^2-2(a)(c)cosB$

Substituting the given values, we get

$b^2=9^2+5^2-2(9)(5)cosB$

$b^2=81+25-90(\frac{-1}{2})$

$b^2=81+25+45$

$b^2=151$

which is the required value of $b^2$ .

Therefore, option D is correct.

3 0

3 years ago

Evaluate the expression for x = -2, y = 3, z = -4. -4x + 5y + 6z *

babunello [35]

Answer:

-1

Step-by-step explanation:

Plug in given values

-4x + 5y + 6z

-4(-2) + 5(3) + 6(-4)

8 + 15 -24

23-24

-1

6 0

3 years ago

Read 2 more answers

Please please help! I'm so stuck on a simple problem

Alisiya [41]

the answer is actually 58.4

the options must be wrong

8 0

3 years ago