3 years ago

80 points, need ASAP

Mathematics

2 answers:

Tresset [83]3 years ago

7 0

9x^2 -c =d

add c to each side

9x^2 = c+d

divide by 9

x^2=(c+d)/9

take the square root on each side

x = +- sqrt ((c+d)/9)

simplify

x = +- 1/3 sqrt (c+d)

Answer: 1/3 sqrt (c+d), - 1/3 sqrt (c+d)

dimulka [17.4K]3 years ago

6 0

To solve for x, you must get it alone.
Lets move c to the other side

9x^2 = c + d

Now lets divide by 9

X^2 = (c + d) / 9

Reverse x squared by finding the square root of the other side

X = square root of (c + d) / 9

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Juli2301 [7.4K]

I am 90% sure it is 10

6 0

3 years ago

Angad, Caroline and Sarah share some sweets in the ratio 7:4:3. Angad gets 52 more sweets than Sarah. How many sweets does Carol

padilas [110]

A = 7x, c = 4x, s = 3x

a = s+52
7x = 3x+52
4x = 52
x = 13

c = 4x = 52
Caroline gets 52.

7 0

3 years ago

Which ordered pairs (x,y) are solutions to the linear equation 2x+3y=6

Nuetrik [128]

Answer:

I think it is 0,2

Step-by-step explanation:

Because you need to substitute the ordered pairs into the linear equation:

so,

2(0)+3(2) = 6

6=6

The two side, so equation are identical, so the correct answer is (0,2).

I hope this helps!

8 0

3 years ago

Read 2 more answers

Which of the following are solutions to | x-1|= 5x + 2 ? Check all that apply.

agasfer [191]

By definition of absolute value, if $x-1\ge0$ , then $|x-1|=x-1$ , so

$|x-1|=5x+2\implies x-1=5x+2\implies4x=-3\implies x=-\dfrac34$

On the other hand, if $x-1$ , then $|x-1|=-(x-1)=1-x$ , and

$|x-1|=5x+2\implies1-x=5x+2\implies6x=-1\implies x=-\dfrac16$

4 0

3 years ago

Please help me!!!!!!!!!!!

Genrish500 [490]

Answer:

(5,0) and (1,0)

Step-by-step explanation:

you can set each factor equal to zero:

-x + 5 = 0

-x = -5

x = 5

x - 1 = 0

x = 1

4 0

2 years ago