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3 years ago

Does the equation y=4x+9 represent a direct variation

Mathematics

1 answer:

Rus_ich [418]3 years ago

3 0

False, it does not represent a direct variation because it does not have another variable given measurement.

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I WILL GIVE BRAINLIEST JUST PLEASE HELP ME

Alex777 [14]

Answer:

3 lol

Step-by-step explanation:

7 0

2 years ago

In a parking lot there are totally 70 vehicles, cars and motorcycles. all together they've got 258 wheels. how many cars are the

docker41 [41]

1 car - 4 wheels
1 motorcycle - 2 wheels

x - number of cars
y - number of motorcycles

so, there are 70 vehicles: x + y = 70
and all togeather they've got 258 wheels: 4*x + 2*y = 258
because each car has 4 wheels, so all car wheels = 4*x,
likewise 2*y for motorcycles

x + y = 70 /* 4
4 x + 2y = 258

4 x + 4 y = 280 (R1)
4 x + 2y = 258 (R2)

2y = 22 /:2 it is R1 - R2
x = 70 - y

y = 11 /motorcycles
x = 70 - 11 = 59 /cars

check:
59 + 11 = 70 ok
59 * 4 + 11 * 2 = 236 + 22 = 258 ok

5 0

3 years ago

Whats the answer to this question

guapka [62]

Answer:

a=20

Step-by-step explanation:

7+13=20

20-7=13

8 0

3 years ago

What is the equation of the line that passes through the point (6,-5)

nexus9112 [7]

Answer:

y= -3/2x + 4

Step-by-step explanation:

hope this helps :)

6 0

2 years ago

Subtract the given function and indicate the domain of the difference

maxonik [38]

Answer:

The domain is $x\in (-\infty,\infty).$

Step-by-step explanation:

Given functions $f(x)=x^2+3x+1$ and $g(x)=2x^2-4x-1$

Subtract these two functions:

$f(x)-g(x)\\ \\=(x^2+3x+1)-(2x^2-4x-1)\\ \\=x^2+3x+1-2x^2+4x+1\\ \\=(x^2-2x^2)+(3x+4x)+(1+1)\\ \\=-x^2+7x+2$

Plot these difference on the coordinate plane (see attached diagram). This function is defined for all vlues of x, so the domain is $x\in (-\infty,\infty).$

6 0

3 years ago