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Oxana [17]
3 years ago
9

3x = y + 4 4y = 3x-1 O A. y = 3x + 3 OB. 4y = 3x - 1 O C. 2y = x-3 D. y = 3x-4

Mathematics
1 answer:
iogann1982 [59]3 years ago
3 0

Answer:

D

Step-by-step explanation:

3x=y+4

4y=3x-1

Subtract 4 from both sides of the second equation to isolate y:

y=3x-4

Therefore, the correct answer is D. Hope this helps!

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Evaluate the following expression when x = 1/2 and y = -3.<br><br><br> -4xy
solong [7]

Answer:6

Step-by-step explanation:

-4xy

-4(1/2)(-3)

-4(-1.5)

6

3 0
2 years ago
Students in an environmental science class raised money to buy plants for a community garden. The students raised money by selli
finlep [7]

Answer:

50 gluten-free cupcakes and 100 regular cupcakes.

Step-by-step explanation:

Let's define the variables:

R = number of regular cupcakes sold

G = number of gluten-free cupcakes sold

The total amount of money raised then is:

M = R*$2.00 + G*$3.00

We also know that:

The number of regular cupcakes sold was 2 times the number of gluten-free cupcakes sold.

then:

R = 2*G

And we also know that the amount of money raised is $350

Then we have the equations:

R = 2*G

R*$2.00 + G*$3.00 = $350

We can replace the first equation into the second one, so we have only one variable:

(2*G)*$2.00 + G*$3.00 = $350

Now we can solve this for G.

G*$4.00 + G*$3.00 = $350

G*$7.00 = $350

G = $350/$7.00 = 50

G = 50

50 gluten-free cupcakes where sold.

And using the equation:

R = 2*G = 2*50 = 100

We can conclude that 100 regular cupcakes were sold.

3 0
2 years ago
If (a, –5) is a solution to the equation 3a = –2b – 7, what is a?
sukhopar [10]

Answer:

d)  1

Step-by-step explanation:

3a = –2b – 7

We have the point (a, -5) so b = -5

Substituting in

3a = -2(-5) -7

3a = 10-7

3a = 3

Divide each side by 3

3a/3 = 3/3

a =1

6 0
3 years ago
What are the 4 different ways you can solve a quadratic equation.
mars1129 [50]

Answer:

by \: using \: completing \: the \: square \: method \\ by \: using \: quadratic \: formula \:  \:  - b \:  plus \: or \: minus \frac{ \sqrt{ {b}^{2} - 4ac } }{2a}  \\ by \: factorizing \:  \\ this \: it \:  the \: only \: one \: i \: know \:

5 0
3 years ago
How do you solve 4/7=n/12
ZanzabumX [31]

4/7=N/12 cross multiply

7N=4*12

7N=48

N=48/7

So your answer is 6 6/7 or 6.8571428


3 0
3 years ago
Read 2 more answers
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