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Ostrovityanka [42]
3 years ago
10

BRAINLIEST ASAP!!!!

Mathematics
1 answer:
ivanzaharov [21]3 years ago
4 0
The graph of a quadratic equation is a U-shaped curved called parabola. It is because the parabola makes very easy to find the axis of symmetry to plot selected points and finding the roots and vertex.

Good luck :)
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Maura is 5 years younger than her sister Cara. Seven years ago, Maura was half as old as her sister. How old is Maura now?
masha68 [24]
Let's call Maura's age now M and Cara's age now C.

We know Maura is five years younger than Cara. In symbols that is, M - 5 = C

We also know that 7 years ago Maura's age was half of Cara's. Maura's age 7 years ago was M-7 and Cara's age seven years ago was C-7. Since Maura's age (7 years ago) was half of Cara's we can write in symbols: M-7= \frac{1}{2}(C-7)

Let's take that last equation and substitute C - 5 for M (this is because according to our first equation these are equal). When we do this we get an equation with only C as the variable and solve for C as follows:

M-7= \frac{1}{2}(C-7)
C-5-7= \frac{1}{2}(C-7)
C-12= \frac{1}{2}C-( \frac{1}{2})(7)
C-12= .5C-3.5
.5C-12= -3.5
.5C= 8.5
C= 17

Cara is 17. Since Maura is 5 years younger she is 12.

As a check, seven years ago Cara was 10 and Maura was 5. It is the case that Maura was half Cara's age seven years ago.
4 0
3 years ago
A class is divided into 4 groups. A bag contains pieces of paper that are red, blue, green, and yellow. For every blue- or green
Alexus [3.1K]

Answer:

C

Step-by-step explanation:

A has nothing to do with the paper inside and B and D don't matter bc its the first student

8 0
2 years ago
Solve: 4x + 6 = 8x - 18
sladkih [1.3K]

Answer:

x=-3

Step-by-step explanation:

4x+6=8x+18

We simplify the equation to the form, which is simple to understand  

4x+6=8x+18

We move all terms containing x to the left and all other terms to the right.  

+4x-8x=+18-6

We simplify left and right side of the equation.  

-4x=+12

We divide both sides of the equation by -4 to get x.  

x=-3

5 0
3 years ago
Read 2 more answers
Trying to get my grade up
GalinKa [24]

Answer:

when x = 0, the answer is 0

when x = 3, the answer is 24

when x = 4, the answer is 32

7 0
2 years ago
Read 2 more answers
A regular polygon is drawn in a circle so that each vertex is on the circle and is connected to the center by a radius Each o th
zysi [14]

A regular polygon is drawn in a circle so that each vertex is on the circle

Each of the central angles has a measure of 40

360 / 40 = 9

so the polygon has 9 sides

Answer is the second option

9



5 0
3 years ago
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