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3 years ago

Which ordered pair is a solution of the equation y=4x

Mathematics

2 answers:

Elden [556K]3 years ago

7 0

Answer:

(-1,-4)

Step-by-step explanation:

We shall substitute them in and see

y =4x

(1,3)

y =4(1) = 4 That is not 3 Not a solution

(-1,-4)

y = 4(-1) = -4 This is a solution

(-4,-1)

y = 4(-4) = -16 This is not -1 Not a solution

(1,-4)

y = 4(1) = 4 This is not -4 Not a solution

Brums [2.3K]3 years ago

4 0

your answer is (-4,-1)

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Suzie wants to buy a shirt that costs $30.00. She has $90.00. How many shirts can Suzie buy?

aivan3 [116]

Answer:

3 shirts

Step-by-step explanation:

90 divided by 30 = 3

Therefore, with $90.00, Suzie can buy 3 shirts.

6 0

2 years ago

Read 2 more answers

For what value of “a”are the graphs of 5y = -2x + 10 and 3y = aX- 15 parallel

Pie

Answer:

a = -6/5

Step-by-step explanation:

For the graphs to be parallel the graphs should have same slope(m)

So we rewrite both our equations in the slope-intercept form then compare the slope to find the value of a like this,

$y=mx+b$

This equation is the slope-intercept form we convert both our equations in this form firstly taking equation 1

$5y=-2x+10\\\\y=\frac{-2x+10}{5} \\\\y=\frac{-2}{5}x+\frac{10}{5} \\\\y=\frac{-2}{5}x+2$

so if we compare it with y = mx + b the coefficient of x is m and hence

m= -2/5 now solving for equation 2

$3y=ax-15\\\\y=\frac{ax-15}{3} \\\\y=\frac{ax}{3}-\frac{15}{3} \\\\y=\frac{a}{3}x-5\\\\$

so here if we compare it with y = mx + b the coeffienct of x is a/3 so since parallel lines have same slope by the formula:

$m_1=m_2$

we equation both the slope to each other to find the value of a like this,

$m_1=m_2\\\\\frac{-2}{5}=\frac{a}{3}\\\\-2(3)=a(5)\\\\-6=5a\\-6/5=a$

so the value of a equals

a= -6/5

8 0

2 years ago

7. You are sitting on a boat on a lake. You can get a sunburn from the sunlight that hits you directly and also from

damaskus [11]

Answer:

Step-by-step explanation:

3 0

2 years ago

please help! functions and relations. f(x)= square root of x-4. find the inverse of f(x) and it’s domain.

likoan [24]

ANSWER:

$\:D.\text{ }f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge-4$

STEP-BY-STEP EXPLANATION:

We have the following equation:

$f(x)=\sqrt{x}-4$

The inverse is the following (we calculate it by replacing f(x) by x and x by f(x)):

$\begin{gathered} x=\sqrt{f^{-1}(x)}-4 \\ \\ \sqrt{f^{-1}(x)}=x+4 \\ \\ f^{-1}(x)=(x+4)^2 \end{gathered}$

The domain would be the range of the original equation, and it would be the range of values that f(x) could take, which was from -4 to positive infinity, that is, f(x) ≥ -4.

Therefore, the domain is x ≥ -4.

So the correct answer is D.

$\:f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge -4$

4 0

7 months ago

WILL MARK U AS BRAINLIEST SHOW WORK SOLVE BY ELIMINATION-3x+y=-18<br> -3x+y=-6

Sindrei [870]

No solution exists for -3x+y=-18 and -3x+y=-6

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2 years ago