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3 years ago

16. Solve this equation for A: A = 2 = 4 A. 6 old B. 8 C. 2 D.4

Mathematics

1 answer:

Fantom [35]3 years ago

8 0

Answer:

Step-by-step explanation:

2=2=4

two is equal to two which makes 4

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kirill [66]

Yes

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3 years ago

In the problem 83 - 10 x 5 - 4, which step should you perform first?

Ksivusya [100]

Multiplication comes before any subtraction...so do 10 x 5 first

3 0

3 years ago

Use the discriminant to determine the number of solutions to the quadratic equation 3x^2+5x=-1

kari74 [83]

Answer:

Two real distinct solutions

Step-by-step explanation:

Hi there!

Background of the Discriminant

The discriminant $b^2-4ac$ applies to quadratic equations when they are organised in standard form: $ax^2+bx+c=0$ .

All quadratic equations can be solved with the quadratic formula: $x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}}$ .

When $b^2-4ac$ is positive, it is possible to take its square root and end up with two real, distinct values of x.

When it is zero, we won't be taking the square root at all and we will end up with two real solutions that are equal, or just one solution.

When it is negative, it is impossible to take the square root and we will end up with two non-real solutions.

Solving the Problem

$3x^2+5x=-1$

We're given the above equation. It hasn't been organised completely in $ax^2+bx+c=0$ , but we can change that by adding 1 to both sides to make the right side equal to 0:

$3x^2+5x+1=0$

Now that we can identify the values of a, b and c, we can plug them into the discriminant:

$D=b^2-4ac\\D=(5)^2-4(3)(1)\\D=25-4(3)(1)\\D=25-12\\D=13$

Therefore, because the discriminant is positive, the equation has two real, distinct solutions.

I hope this helps!

4 0

3 years ago

For the figure shown, find m 1. 115 degrees 56 degrees m 1=°

atroni [7]

I believe it would be 115 plus 56. subtract that from 180. i believe thisbis your answer

3 0

3 years ago

3. A driver's path when diving off of a platform is given by h(t)=-5t^2+10t+20, where h(t) is the distance above water, in feet,

agasfer [191]

Answer:

3a.=20ft 3b.=1 second 3c.=3.25seconds

Step-by-step explanation:

Hello, Courtney!

h(t)=-5t^2+10t+20

20 would be the height so 3.a would be 20ft

3b. 25=-5t^2+10t+20

-5t^2+10t-5 then divide by greatest factor the answer would 1 second

3c. 0=-5t^2+10t+20 divide by greatest factor and would get 3.25 and -1.25 but can't have negative so the answer is 3.25.

I hope this helps

best you know who!

5 0

3 years ago