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3 years ago

Terrible at math. Anyone out there smart in math

Mathematics

2 answers:

allsm [11]3 years ago

7 0

Answer:

Step-by-step explanation:

Ann [662]3 years ago

4 0

Answer:

A, C, E

Step-by-step explanation:

You can put A, C, and E in the blank.

You might be interested in

The equation for a parabola has the form y=ax2+bx+c, where a, b, and c are constants and a≠0. find an equation for the parabola

IRISSAK [1]

The equation of parabola is

$y= ax^2 + bx +c$

For point (-1,-9), equation of parabola is

$-9 = a(-1)^2 +b(-1)+c
\\
-9 = a -b+c$

For point (1,7), equation of parabola is

$7 = a(1)^2 + b(1)+c
\\
7 = a + b +c$

For point (-6,-14), equation of parabola is

$-14 = a(-6)^2 +b(-6)+c
\\
-14 = 36a -6b +c$

So we have three equations , which are

$a - b + c =-9,
\\
a + b + c = 7
\\
36a -6b+c = -14$

Subtracting first two equation will give

$-2b = -16
\\
b=8$

Subtracting second and third equation gives

$a+b+c-36a+6b-c = 7+14
\\
-35a +7b = 21
\\
-5a + b =3$

Substituting 8 for b, we will get

$-5a + 8 =3
\\
-5a = -5
\\
a =1$

back substituting 8 for b and 1 for a, we will get

$1+8+c = 7
\\
c = -2$

So we have

$a=1, b=8 and c=-2$

Therefore required equation is

$y= x^2 +8x-2$

7 0

3 years ago

20.

DiKsa [7]

Answer:

49x-21y-6

Step-by-step explanation:

7(7x) 7(-3y) -6

49x-21y-6=0

7 0

2 years ago

John purchased a sport utility vehicle for $40,000.00. Sales tax was 6%. The total price, including sales tax, was ________.

pochemuha

The total price would be 42,400

8 0

4 years ago

Read 2 more answers

Are the graphs of 4x-6y=-24 and y=2/3x+4 parallel perpendicular or neither?

ANTONII [103]

Answer:

neither

Step-by-step explanation:

4x - 6y = -24 y = 2/3x + 4

-6y = -4x - 24

-6/-6y = -4/-6x -24/-6 y =2/3x + 4

y = 2/3x +4

Same line

5 0

3 years ago

Marc was born on his grandmother’s 56th birthday. In how many years will Marcs grandmother be 5 times as Marc will be then?

sergey [27]

Answer:

In 14 years Marc's grandmother will be 5 times as Marc will be then

Step-by-step explanation:

1. Information given to us to solve the problem:

Marc's age today = 0

Marc's grandmother age today = 56

2. In how many years will Marc's grandmother be 5 times as Marc will be then?

x = Number of years when Marc's grandmother age will be 5 times as Marc will be then

Let's solve for x, this way:

5 times Marc age in x years = Marc's grandmother age in x years

5 (0 + x) = 56 + x

5x = 56 + x

5x - x = 56 (Subtracting x at both sides)

4x = 56

x = 56/4

x = 14

Let's prove that x = 14 is correct:

5 (0 + 14) = 56 + 14

70 = 70

We proved that x = 14 is correct

In 14 years Marc's grandmother will be 5 times as Marc will be then

6 0

3 years ago