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3 years ago

1 + 1 ple ned fro myt tst

Mathematics

1 answer:

Vitek1552 [10]3 years ago

6 0

2 the answer is 2 ok

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Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth -5y^2+2y=-2

77julia77 [94]

5y^2-2y-2 = 0

y = 1/5+ √11/5 or 1/5 - √11/5

6 0

3 years ago

Instructions: Find the missing side lengths. Leave your answers as radicals in simplest form.

serg [7]

Given:

A figure.

To find:

The values of x and y.

Solution:

We know that, in a right angled triangle,

$\sin \theta =\dfrac{Perpendicular}{Hypotenuse}$

$\sin 60^\circ =\dfrac{x}{16}$

$\dfrac{\sqrt{3}}{2} =\dfrac{x}{16}$

Multiply both sides by 16.

$\dfrac{\sqrt{3}}{2}\times 16=\dfrac{x}{16}\times 16$

$8\sqrt{3}=x$

And,

$\cos \theta =\dfrac{Base}{Hypotenuse}$

$\cos 60^\circ =\dfrac{y}{16}$

$\dfrac{1}{2}=\dfrac{y}{16}$

Multiply both sides by 16.

$\dfrac{16}{2}=y$

$8=y$

Therefore, the missing side lengths are $x=8\sqrt{3}$ and $y=8$ .

6 0

3 years ago

If 3 times a certain number is increased by 4 the result is 28. What is the number?

Minchanka [31]

3x+4=28 because 3 times an unknown number was mentioned first and mentioned together so they will be together, increased by 4 is +4 and comes after, the result of is the same as equals so you put the equals sign and whatever number they gave after.

8 0

3 years ago

Miss Ray wrote a test with 15 questions. Some questions were matching problems and some were multiple choice. Matching questions

77julia77 [94]

Well,

if 10 of the questions were worth 5pts. that would equal =50

and if 5 were worth 10pts. that would equal= 50

50 + 50 = 100pys.

4 0

4 years ago

Solve the equation using the quadratic formula.

BabaBlast [244]

The value of x is -9 and 3.Option D.

Step-by-step explanation:

Given,

$-x^{2} +27 = 6x$

To find the value of x.

We will apply middle term factor formula.

The given equation can be written as,

$x^{2} +6x-27 = 0$

or, $x^{2}$ +(9-3)x-27 = 0

or, x²+9x-3x-27= 0

or, x(x+9)-3(x+9)=0

or, (x+9)(x-3) = 0

So, x = -9 and x = 3

Hence,

The correct option is Option D.

4 0

3 years ago