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1 year ago

Please help urgently

Mathematics

1 answer:

Minchanka [31]1 year ago

3 0

Answer:

-20

Step-by-step explanation:

Use the distributive property to get $2xy-14$ (you multiply both xy and -7 by 2.) Now plug in the x and y values to get: $2(-1)(3)-14$ . This gets you $-6-14$ which is $-20$ .

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Which line has the equation 2x - 3y = 6? (Please explain how you got your answer)

notsponge [240]

First, isolate y:
2x - 3y = 6
-3y = -2x + 6
3y = 2x - 6
y = 2/3x - 2
That means that the line passes through the point (0, -2) and has a positive slope of 2/3. So it would be choice A because the line in choice A passes through the point (1, -2) and has a positive slope. Choice D also passes through the point (0, -2) but has a negative slope so it cannot be the correct answer.
Choice A is correct.

3 0

2 years ago

Your class hopes to collect at least 325 cans of food for the annual food drive. there were 135 cans donated the first week and

vampirchik [111]

They have collected $135+89=224$ cans until now. To equal 325, they need $325-224=101$ cans more.

Let C be the number needed to equate atleast 325.

$135+89+C\geq 325$

If we solve the inequality in part A, we can find minimum number of C to meet the goal of 325 cans.

$135+89+C\geq 325\\224+C\geq325\\C\geq325-224\\C\geq101$

So they need minimum 101 to complete the target and more than that to surpass.

ANSWER: 101 cans are needed to meet the goal and more than that to surpass the goal.

5 0

2 years ago

In Section 1.3 we saw that the autonomous differential equation m dv dt = mg − kv, where k is a positive constant and g is the a

Thepotemich [5.8K]

Answer:

$\lim_{t \to \infty} v = \frac{mg}{k}$

Step-by-step explanation:

Firstly its necessary to put the autonomous DE in its normal form to get

$\frac{dv}{dt} = g - \frac{kv}{m}$

To get the critical point we solve

g - $\frac{kv}{m} = 0$

$\frac{kv}{m} = g--> v = \frac{mg}{k}$

The critical point is $v = \frac{mg}{k}$

$\frac{dv}{dt} > 0 for v < \frac{mg}{k}$

and

$\frac{dv}{dt} < 0 for v > \frac{mg}{k}$

from the phase portrait we observe that the critical point

v = $\frac{mg}{k}$ is stable

$\lim_{t \to \infty} v = \frac{mg}{k}$

5 0

2 years ago

HOW DO U DO THIS!? 2x+3=13

Soloha48 [4]

Answer:

x = 5

Step-by-step explanation:

Solve for x:

2 x + 3 = 13

Hint: | Isolate terms with x to the left hand side.

Subtract 3 from both sides:

2 x + (3 - 3) = 13 - 3

Hint: | Look for the difference of two identical terms.

3 - 3 = 0:

2 x = 13 - 3

Hint: | Evaluate 13 - 3.

13 - 3 = 10:

2 x = 10

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides of 2 x = 10 by 2:

(2 x)/2 = 10/2

Hint: | Any nonzero number divided by itself is one.

2/2 = 1:

x = 10/2

Hint: | Reduce 10/2 to lowest terms. Start by finding the GCD of 10 and 2.

The gcd of 10 and 2 is 2, so 10/2 = (2×5)/(2×1) = 2/2×5 = 5:

Answer: x = 5

8 0

2 years ago

Read 2 more answers

Look at the diagram below... I need help!

sdas [7]

If < 3 is 36 than the one across is also 36. You can calculate the < next to a given one, by subtracting it by 180.
A: < 1 is 36 degrees and < 4 is 144 degrees.
B: X=47

I found B by setting the values as equal and solving (In the picture).

Hope this helped!

7 0

2 years ago

Please help urgently ​

Please help urgently