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weqwewe [10]
3 years ago
6

Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4 given the same value of y?

Mathematics
1 answer:
jeka943 years ago
5 0
Hello there,

The correct answer is C

Here's why,
-9(-8/7)+4y=8 is -4/7

and

-3(-8/7)-y=4 is -4/7

Hope this helps!
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Two steamers leave a port on a river at the same time, traveling in opposite directions. Each is traveling 22 mph. How long will
vivado [14]

It took both  2.5 hours to be 110 miles apart

Speed is the ratio of distance travelled to time taken. Speed is given by:

Speed = distance / time

Since both steamers is travelling at 22 mph. therefore they cover the same distance at the same time. For them to be 110 miles apart, they need to each have covered 55 miles in the opposite direction

22 = 55/time

time = 2.5 hours

Therefore after 2.5 hours they would have covered 55 miles each therefore being 110 miles apart.

Find out more at: brainly.com/question/22610586

7 0
3 years ago
Blairs new computer cost 5$ less than twice the cost og her old computer. Her new computer cost 709$. how much did blairs old co
Phantasy [73]

The cost of old computer is $ 357

<em><u>Solution:</u></em>

Let "x" be the cost of old computer

From given,

Cost of new computer = $ 709

Blairs new computer cost 5$ less than twice the cost of her old computer

Therefore,

Cost of new computer = twice the cost of old computer - 5

Cost of new computer = 2x - 5

709 = 2x - 5

2x = 709 + 5

2x = 714

Divide both sides by 2

x = 357

Thus the cost of old computer is $ 357

8 0
4 years ago
10.
miv72 [106K]
A. To answer this question, we must consider two inequalities. The first inequality we will construct is regarding the number of tickets sold with respect to capacity. The theater cannot exceed the allotted 200 seats, so this would indicate we would use a less than or equal to inequality. The inequality we would construct to illustrate this using adult and child tickets is x + y <= 200.
The second inequality we will construct is based upon the ticket prices set and the theater’s goal. The problem indicates the theater wants to sell “at least $1,500 worth of tickets...” To create the inequality here, we will create it as follows: 12.5x + 6.25y >= 1,500.
To find the intersection point, we must isolate y. In order to do this, move x to the other side of both inequalities. Inequality 2 can be simplified to y >= -12.5x / 6.25 + 1,500 / 6.25. Graph and identify the solution from there.
8 0
3 years ago
(07.03 LC)
Grace [21]

Answer:

B

Step-by-step explanation:

THis is a single equation with a single variable [y].

We can separate the variable in one side and the numbers to another and solve for y. Shown below:

3y + 4 = -2

3y = -2 - 4

3y = -6

y = -6/3

y = -2

THus, this equation has only 1 solution. B is correct

7 0
3 years ago
Are the expressions below equivilent?<br><br> 3(4x + 8)<br> 12x + 24
Black_prince [1.1K]
Yes because 3*4x is 12x and 3*8 is 24 so you would get 12x+24
4 0
4 years ago
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