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Alika [10]
3 years ago
11

Find the value of p for which x = -2, y = -1 is a solution of linear equation 5x + 2py = 2p.​

Mathematics
1 answer:
Rom4ik [11]3 years ago
8 0
I think p=4
How I solved it:
5(-2)+2p+2(-1)=2p
-10+2p+-2=2p So cross out last
-2p -2p 2p:)
= -10+2p+-2
+10 +10 Cross out the 10
= 2p=8
= divide both sides by 2p
= 2p/2= 8/2
= cross out the 2.
= which leaves
= p=4 we get 4 because we divide 8 to 2:)


I don’t know if I’m right but yea...



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zavuch27 [327]

A straight line passing through the point (-2,1) and having a gradient of -3 yields the equation y = -3x - 5.

We know that a straight line is an infinitely long line with no curves on it. A straight line's equation is

y = mx + c...(1), where m is the gradient of the straight line and c is a constant.

Given that the gradient of the given straight line = m = -3.

Putting this value in (1), we get

y = -3x + c ...(2)

Again, the given straight line passes through the point (-2,1). So, we can put x = -2 and y = 1 to get the value of the constant c.

So, 1 = (-3)(-2) + c

i.e. 6 + c = 1

i.e. c = 1 - 6 = -5

(2) can be written as

y = -3x - 5

Therefore the equation of the given straight line is

y = -3x - 5

Know more about straight lines here -

brainly.com/question/8085796

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6 0
2 years ago
The volume of a cylinder is 1.54 litre. If the height is 20 cm ​
11111nata11111 [884]

Answer:

Radius = 4.95 cm

Step-by-step explanation:

I am assuming you need the radius of the base of the cylinder.

Volume = 1.54 * 1000 = 1540 cm^3

Volume = πr^2h so:

1540 =  π*r^2*20

r^2 = 1540/20 π = 24.510

r = 4.95 cm.

5 0
2 years ago
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Using the powers of 10, which would be the first to subtract when 742 divided by 61?
cestrela7 [59]

Answer:

610

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4 0
3 years ago
Kayla wants to purchase some candy. All varieties of candy are $2.50. Kayla buys strawberry and mango candy. Write an expression
Vikki [24]

Answer:

2.50s + 2.50m

Step-by-step explanation:

s stands for strawberry

m stands for mango candy

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hope this helps a bit!!!

4 0
2 years ago
A number d is decreased by 5 and then doubled​
Rama09 [41]

Answer:

(d-5)x2

Step-by-step explanation:

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(6-5)x2

(6-5)=6-5=1

(1)x2=1x2=2

8 0
3 years ago
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