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Gekata [30.6K]
3 years ago
11

HELP ASAP PLZ I HAVE NEVER BEEN MORE CONFUSED ON HOW TO WRITE AN EQUATION ;-;

Mathematics
1 answer:
Rainbow [258]3 years ago
5 0
Me too hhaha haha 23
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Which equation could be solved using this application of the quadratic formula?
Alex_Xolod [135]

Answer:

C. x^2 + 2x - 1 = 3

Step-by-step explanation:

The standard form of a quadratic equation is

ax^2 + bx + c = 0

We need to use the quadratic formula and the given expression to find the values of a, b, and c.

The quadratic formula is

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Where the formula has -b, the problem has -2, so b = 2.

Now we have

ax^2 + 2x + c = 0

In the denominator, where the formula has 2a, the problem has 2(1), so a = 1.

Now we have

x^2 + 2x + c = 0

Inside the root, the quadratic formula has -4ac. the problem shows -4(1)(-4). Since we already know that a = 1, then c = -4.

Now we have

x^2 + 2x - 4 = 0

Let's look at choice A.

x^2 + 1 = 2x - 3

Subtract 2x from both sides. Add 3 to both sides.

x^2 - 2x + 4 = 0   <em>This is not it!</em>

Let's look at choice B.

x^2 - 2x - 1 = 3

Subtract 3 from both sides.

x^2 - 2x - 4 = 0     <em>This is not it!</em>

Let's look at choice C.

x^2 + 2x - 1 = 3

Subtract 3 from both sides.

x^2 + 2x - 4 = 0     <em>This is it!</em>

Answer: C. x^2 + 2x - 1 = 3

8 0
3 years ago
If angle ABC is congruent to angle DEF, what substitution property would this equation be??? Angle DEF=180 degrees - angle ABC A
Elodia [21]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
Can someone please answer this question please help please answer it correctly and please show work please help I need it please
mr_godi [17]

Answer:

Step-by-step explanation:

24)

200= 3(21) + 4x

200= 63 +4x

-63   -63

137= 4x

divide each side by 4

34 = x

c

25)

.5(pi)= about 1.6

1.6(2.5)= 4

c

44)

equation-     T= 12.17+0.75v

105.75= 12.17 + .75v

-12.17    -12.17

93.58= .75v

divide each side by .75

answer 125

3 0
3 years ago
Read 2 more answers
What do you already know about linear relationships?
inna [77]

Answer:

A linear relationship (or linear association) is a statistical term used to describe a straight-line relationship between two variables. Linear relationships can be expressed either in a graphical format or as a mathematical equation of the form y = mx + b.

8 0
3 years ago
To make two batches of nut bars jayda needs to use 4eggs. How many eggs are used in each batch of nut bars?
zloy xaker [14]
2 eggs
4÷2=2
happy to help
4 0
3 years ago
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