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ICE Princess25 [194]
2 years ago
12

Work out the missing numbers: a)(-4)x =320

Mathematics
2 answers:
MA_775_DIABLO [31]2 years ago
7 0

Answer:

x=-80

Step-by-step explanation:

zubka84 [21]2 years ago
5 0

Answer:

x=-80

Step-by-step explanation:

a) (-4)x=320\\\\x=\frac{320}{-4} \\\\x=-80

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Let f(x) = -20x2 + 14x + 12 and g(x) = 5x - 6. Find f/g and state its domain.
UkoKoshka [18]

Solution

f(x) = -20x^{2} +14x + 12 and g(x) = 5x - 6.

(f/g)(x) = \frac{f(x)}{g(y)}

(f/g)(x) = \frac{-20x^{2}+14x +12 }{5x - 6}

<u>Step 1: </u>Now we have to factorize the numerator.

f(x) = -20x^2 + 14x + 12

Factor out -2, we get

= -2 (10x^2 - 7x - 6)

Now we can factorize 10x^2 - 7x - 6                  

f(x) = -2(2x + 1) (5x - 6)

<u>Step 2: </u>Plug in the factors

(f/g)(x) = \frac{-2 (2x +1)(5x - 6)}{(5x - 6)}

<u>Step 3:</u> Cancel out the common factor (5x - 6) from the numerator and the denominator, we get

(f/g)(x) = -2(2x +1) = -4x -2

Since -4x -2 is linear expression, the domain is all the real numbers.

Therefore, the answer is –4x – 2; all real numbers

Thank you :)

4 0
2 years ago
Need some help with this. It says to find x.
yKpoI14uk [10]

Answer:

3x = 15

x = 5

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Can you help me with this one
exis [7]
5 is b and 1 is a
1 is A because just change the x value with the number in the table for x and see if y matches like
Y=-2x+6
Y=-2*1 + 6
4 =-2*1+6

And for 5
Day is x, y is depending on x and your going to add .4 to everything. But it’s growing .2 every day so it’s
Y=0.2x+0.4

I hope this helps you if I’m not right please tell me so if other people use those they know I’m wrong if I am. I don’t think so thou. If not please give me brainiest. Thank you!!
Have a nice night.
- Pam Pam
7 0
2 years ago
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Help please I hate math
Hitman42 [59]

Answer:

Step-by-step explanation:

7 0
2 years ago
Select ALL the correct answers.
Alona [7]
Income of the first account after x years:
1,850(1.026)^x
Income of the second account after x years:
2,015(1.015)^x
Equating the above tw values we get the equation:
1,850(1.026)^x=2,015(1.015)^x
Solving the above equation for x:
x=8
Answer 8 years. 
4 0
3 years ago
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