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4 years ago

This the picture for my question

Mathematics

2 answers:

Lera25 [3.4K]4 years ago

7 0

So, we know that the quadratic formula is x=-b+- the square root of b^2-4ac and all of this divided by 2a. You might be like "wow, where did all of these come from?" It is actually really easy. So, let's take your first equation: 2x^2-19x+24=0. So, let us look at the standard form for a quadratic formula: a^2+b+c=0. Now, If you look at the normal equation and the standard form for a quadratic, you will see that they are alike. Now, just match the letter with the number: a=2, b=-19, and c=24. Now that you know what each letter represents, you can plug everything into the equation x=-b+- the square root of b^2-4ac and all of this divided by 2a.

Ratling [72]4 years ago

5 0

3 is (x-3)(x-9) as when you use FOIL, you get -12x when adding -3x and -9x and also 27 when you multiply -3 times -9.

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What is nine minus one third?

Katarina [22]

Answer:

$\frac{26}{3}$ = $8.6...$ = $8\frac{2}{3}$

Step-by-step explanation:

You multiply 9 x 3=27

(leave 1/3 alone, it's already good)

you have a 27/3-1/3

(subtract those)

your answer is 26/3

(see answer above for decimal form and mixed fraction form)

8 0

2 years ago

There are 500 people in a building. 20% of half of them went out. 15% of those who went out came back in. How many people are in

Setler79 [48]

Answer:

415people

Step-by-step explanation:

20%of250=100people

15%of the 100people=15people

So 100 went out remaining(500-100)400

Then 15 returned=400+15

415

5 0

3 years ago

Read 2 more answers

31. What is the maximum volume of a square pyramid that can pit inside a cube with a side length of 24cm?

REY [17]

The answer is B) 4,608cm^3

The volume of the square pyramid is:
V = a² * h / 3
a - the side length of the base
h - the height of the pyramid.

Since it is inside the cube, then a = h = 24 cm.

So:
V = 24² * 24 / 3 = 13,824 / 3 = 4,608 cm³

4 0

3 years ago

asic Geometric Shapes - Part 1 What is the value of x (3x +50) Enter your answer in the box. (6x - 10)

r-ruslan [8.4K]

1) From the picture, we see that we have two vertical angles:

$\begin{gathered} A=(3x+50)^{\circ} \\ B=(6x-10)^{\circ} \end{gathered}$

2) Now, because of the "Vertical Angles Postulate" from geometry, we know that angles A and B are equal, so equalling the angles and replacing by their expression from above, we get the following equation in terms of x:

$\begin{gathered} A=B \\ 3x+50=6x-10 \end{gathered}$

3) We must solve the last equation for x, doing that we find:

$\begin{gathered} 3x+50=6x-10 \\ 50=6x-10-3x \\ 50+10=6x-3x \\ 60=3x \\ x=\frac{60}{3} \\ x=20 \end{gathered}$

Steps to solve the equation

0) We have the equation:

$3x+50=6x-10$

1) We want all the terms with x on one side, and the other on the other one. So we pass the term +3x to the right as -3x:

$50=6x-10-3x$

2) Now we pass the term -10 to the left as +10:

$50+10=6x-3x$

3) We sum the terms on each side:

$60=3x$

4) We pass the 3 that multiplies the x on the right, dividing the 60 on the left:

$x=\frac{60}{3}$

5) Finally we make the division and we get:

$x=20$

Answer

x = 20

6 0

1 year ago

Suppose you have an empty jar with a mass of 196.0 g. After filling the jar with jelly beans the mass of the jar + jelly beans i

garik1379 [7]

Answer: About 104 jelly beans were added to the jar.

Step by Step Explanation: If you subtract the mass of the jar from the mass before you added jelly beans you will get 127.8. Once you divide that number by 1.23 you will get about 104.

4 0

3 years ago