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kap26 [50]
3 years ago
12

Mark is solving the equation 4x2 + 2x = -9 using the quadratic formula.

Mathematics
1 answer:
Masteriza [31]3 years ago
6 0
4x^2 + 2x = -9
4x^2 + 2x + 9 = 0

remember that the form of quadratic is ax^2 + bx + c = 0

so
a = 4
b = 2
c = 9
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I’m confused :( I will mark as Brainliest and give you points
Ludmilka [50]

Answer:

123.5 square inches

Step-by-step explanation:

Given: To find the area of a rectangle, you have to multiply base times height.

To find the area of a triangle, you have to do base times height devided by 2.

Finding the area: Let's break up this shape into polygons. At the bottom there is a rectangle. We know that to find the area of the rectangle you have to do base times height. 13in•7in will give you <u>91in</u> square for the rectangle.

Now for the triangle. If you can see, if you break the triangle in half, there are 2 right triangles. Let's look at the right one for now. Since we know that to find the area of a triangle you have to do base times height divided by 2,  you do 5in•6.5in=32.5in. 32.5in divided by 2 is <u>16.25in </u>square which is the area of one triangle. You might be wondering why i did 5•6.5, and that's because at the bottom of the rectangle you can see it's 13in, and 13in÷2=6.5in.

We already found the area of the rectangle and one triangle. The other triangle is equal to it so we can just do 16.25+16.25=<u>32.5in</u> square for both of the triangles.

Now we add it all up: 32.5+91=123.5 square inches

8 0
3 years ago
What’s the answer to this?
antiseptic1488 [7]

Answer:

17

Step-by-step explanation:

4 0
3 years ago
PLEASEEEE
belka [17]

Answer:

The answer to your questions is: 25 new teachers

Step-by-step explanation:

Data

# of students = 2000

ratio = 3:80 teachers to students

New teachers = ?

Process

I suggest to use rule of three to solve this problem

                     3 teachers ----------------  80 students

                      x                ----------------  2000 students

                  x = (2000 x 3) / 80 = 75 teachers

               Number of initial teachers = 75

The ratio change to 1:20

                     1 teacher -------------------  20 students

                     x             -------------------   2000 students

                     x = (2000 x 1) / 20

                    x = 100 teachers

Number of new teachers = 100 - 75 = 25

3 0
3 years ago
WILL MARK BRAINLIEST <br>slove for the following variables ​
UkoKoshka [18]

Answer:

Step-by-step explanation:

All triangle must have angle values adding up to 180 degrees.First solve for y;

110+33+y=180

y=37 degrees

x is the opposite inverse angle of 33 degrees, it has an angle measure of 33 degrees.

z is equal to 110 degrees because it is opposite to that angle measure because all rhombi have 2 way symmetry.

8 0
3 years ago
Read 2 more answers
What are 2 equivalent fractions for 4/5?
VashaNatasha [74]
Two equivalent fractions would be 8/10
and 12/15<span />
8 0
3 years ago
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