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2 years ago

What is the name of the following formula: -b + vb2-4ac? 2a

Mathematics

1 answer:

Mila [183]2 years ago

7 0

Answer:

quadratic formula

Step-by-step explanation:

this applies when you look for the x values of a quadratic equation

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Find the product of (2x + 5y)(2x − 5y).

Nana76 [90]

The final answer for this is 4x^2-25y^2.

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3 years ago

Read 2 more answers

A secant and a tangent to a circle intersect in a 42-degree angle. The two arcs of the circle intercepted by the secant and the

Amanda [17]

Answer:

The measure of the third arc is $150\°$

Step-by-step explanation:

step 1

we know that

The measurement of the external angle is the semi-difference of the arcs which comprises

in this problem

Let

x----> the greater arc of the circle intercepted by the secant and the tangent

y----> the smaller arc of the circle intercepted by the secant and the tangent

$42\°=\frac{1}{2}(x-y)$

$84\°=(x-y)$ ----> equation A

$\frac{x}{y}=\frac{7}{3}$

$x=\frac{7}{3}y$ -----> equation B

Substitute equation B in equation A and solve for y

$84\°=(\frac{7}{3}y-y)$

$84\°=(\frac{4}{3}y)$

$y=3*84\°/4=63\°$

Find the value of x

$x=\frac{7}{3}(63\°)=147\°$

step 2

Find the measure of the third arc

Let

z------> the measure of the third arc

we know that

$x+y+z=360\°$ -----> complete circle

substitute the values and solve for z

$147\°+63\°+z=360\°$

$z=360\°-(147\°+63\°)=150\°$

3 0

2 years ago

Answer this question if you don't smell like moldy pizza. What is 2 plus 78 divided by 0

olchik [2.2K]

Answer:

infinity

Step-by-step explanation:

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2 years ago

The driveway measuring 280 ft.² is to be paved john has an apprentice working for him and divide the child between the two of th

Furkat [3]

Answer:

Step-by-step explanation:

It would be 40

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2 years ago

Which transformations take f(x)=3x+1 to g(x)=−3x-5 ?

lbvjy [14]

<span>reflection over the x-axis and a translation 4 units down Refelcting f(x) over the x axis gives -f(x)=-3x-1 Subtracting a constant from -f(x) moves the graph of -f(x) that many units down. -f(x)-4=-3x-5=g(x) This shows that g(x) is obtained by reflecting f(x) over the x-axis and then translating 4 units down.</span>

8 0

3 years ago