Factorize 3x² + 7xy - 6y².

Evaluate the expression in (a) above if x = 4 and y = 3.

Please help. Thanks.​

[tex]f(x) = 3x2 - 5[/tex]

[tex]f( - 5) = 3( - 5)2 - 5 \\ = 3 \times - 5 \times 2 - 5 \\ = - 30 - 5 \\ = - 35[/tex]

Answer:

the answer is A

Step-by-step explanation:

Answer:

9s-3s10s or 3-10s

Step-by-step explanation:

10s+s-3s10s+s-3s

first of all, we collect like terms

10s+s+s-3s-3s10s

=9s-3s10s

it could also be equal to

9s/3s-(3s10s/3s)

3-10s

when we divide through by 3s

Answer:

Let x = speed for the first 96 miles

x - 9 = speed for the last 100 miles

Distance = (rate)(time), so time = (distance)/(rate)

(time for first part of trip) + (time for last part of trip) = 4 hours

So, (96)/(x) + (100)/(x - 9) = 4

Multiply both sides by the LCD (x)(x - 9) to get

96(x - 9) + 100x = 4x(x - 9)

96x - 864 +100x = 4x2 - 36x

4x2 - 232x + 864 = 0

Divide both sides by 4 to obtain x2 - 58x +216 = 0

(x - 4)(x - 54) = 0

x = 4 or x = 54

Note that x can't equal 4 because, in that case, x - 9 would be negative, so x = 54 miles per hour.

Step-by-step explanation:

ok

Answer:

5 months

Step-by-step explanation:

Answer:

boring

Step-by-step explanation:

Answer:

I feel great that is why I feel like helping others. :)

Step-by-step explanation:

Answer:

I did this

Step-by-step explanation:

Answer:

3/4 and 10/15 are not proportional

Step-by-step explanation:

3 is not a factor of 10 and 4 is not a factor of 15

Answer:

No

Step-by-step explanation:

3/4 is already simplified all the way, but 10/15 is not. 10/15 simplifies down to 2/3 (because 5x2=10 and 5x3=15), which is not equivalent to 3/4.

Answer:

As follows,

Step-by-step explanation:

a) Completely wrong,

Correction

x^2-7x+12

x^2-4x-3x+12

x(x-4)-3(x-4)

(x-3)(x-4)

b)Partially wrong

Correction

35x^2-5x

5x(7x-1)

Answer:

13 nickles

Step-by-step explanation:

x= dimes

y= nickles

.1x+.05y=2.35

x-4=y

subsituting this...

.1x+.05(x-4)=2.35

.1x+.05x-.2=2.35

.15x=2.55

x=17

17-4=y

13=y

13 nickels

Answer:

9x + y = 12

Step-by-step explanation:

Hi there!

We are given the equation y - 3 = -9(x-1) and we want to write it in standard form

The equation is currently in point-slope form, which is [tex]y-y_1=m(x-x_1)[/tex], where [tex](x_1 , y_1)[/tex] is a point and m is the slope. Standard form is ax + by = c, where a, b, and c are free integer coefficients

We can first convert the equation from point-slope form into slope-intercept form, which is y=mx+b, where m is the slope and b is the y intercept

We can distribute 9 to every term on the right side:

y - 3 = -9x + 9

Now add 3 to both sides

y = -9x + 12

Now the equation is in slope-intercept form (y=mx+b). To make it standard form, add 9x to both sides, to make the form ax + by = c .

9x + y = 12

Hope this helps!

Answer:

31.5 minutes

Step-by-step explanation:

45x35=1575

1575/50=31.5

Answer:

if 1 equal to x

and 2 equal to x-4

that mean

(x)+(x-4)=180

2x-4=180

2x=184

x=92

lets start to find the angles that marked with numbers

1=92

2=88

3=88

4=92

5=92

6=88

7=88

8=92

that's it

Have a great day

Answer:

45

Step-by-step explanation:

Answer:

divide: 40

multiply:4.5x10^10

Step-by-step explanation:

Answer:

a = a

b = b

c = c

Step-by-step explanation:

Formula: [tex]a^2+b^2=c^2[/tex]

C is always the largest number

a times a + b times b = c times c

Answer:

a is less than or equal to 7

Step-by-step explanation:

This is the case because we can treat the less than or equal to sign as an equal sign. The only time it changes is when we divide by a negative, but we do not do that in this problem. First, you subtract 7 from both sides. That leaves us with a 4a on one side and a 28 on the other. Then, you divide both sides by four to get a is less than or equal to 7. I hope this helps!

Answer:

i dont get this why is it crossed out

Step-by-step explanation:

Answer:

99235

4

Explanation: Addition, and Multiplication

Answer:

3

Step-by-step explan4ation:

Always include the steps and/or background required to get to the final answer. Let’s help other people understand and solve future problems on their own.

Answer:

Step-by-step explanation:

Slope= - 4/7

y-intercept: 1

The slope is negative. 4 down from y=1 and seven to the right and 4 up from y=1 and 7 to the left. You only need two points to trace a line.

Answer:

-8 -20 or - 8 - 20

correct me if I'm wrong

Answer: -28

Step-by-step explanation: the word "difference" in math means subtraction. so -8-20 is -28

Answer:

1) x = 9

2) y = 16

3) y = -1

Step-by-step explanation:

Do PEMDAS in reverse.

For every equation, your goal is to seperate the variable (x,y, or whatever letter) by itself.

1) 2x-7 = 11

Add 7 to both sides.

2x = 18

Divide both sides by 2.

x = 9

2) [tex]\frac{3}{4}y = 12[/tex]

Divide both sides by 3/4 (which turns into multiplying by 4/3).

Left side

[tex]\frac{3}{4}x * \frac{4}{3}\\\\\frac{3}{4}x * \frac{4}{3} = \frac{3*4}{4*3}x\\1x\\x[/tex]

Right side

[tex]12*\frac{4}{3}\\\\\frac{12}{1} *\frac{4}{3}\\\\ \frac{12}{1} *\frac{4}{3} = \frac{12*4}{1*3}\\\\\frac{48}{3} \\16[/tex]

3) 9(y+3) = 18

Remember do PEMDAS in reverse.

Divide both sides by 9.

y+3 = 2

Subtract both sides by 3.

y = -1

Answer x is less than or equal to -1

Step-by-step explanation:

-5x-9    -4

-5x-9+9    -4+9

-5x    5

-5x/-5x  5/-5

x less than or equal to -1

Answer:

x  [tex]\leq[/tex]  -1

Step-by-step explanation:

(-5x - 9) [tex]\geq[/tex]   -4

add 9 to both sides of the equation

-5x-9  [tex]\geq[/tex] -4

    +9      +9

--------------------

the -9 and +9 cancel out

-5x [tex]\geq[/tex] 5

then, divide both sides by -5 to get x

-5x  [tex]\geq[/tex]  5

------   -------

-5         -5

x  [tex]\leq[/tex]  -1

by the way, the sign changed from  [tex]\geq[/tex] to [tex]\leq[/tex] because we divided by a negative number to get x.      

Answer: 24 inches.

Step-by-step explanation: since theres 12 inches in a foot, and 2 feet altogether, you would multiply 12x2.

Answer:

The answer would be:

c. [tex]2\sqrt{2}[/tex]

Answer:

Answer is c I think

Step-by-step explanation: