3 years ago

3x+y= 7 2x+y= 6 what is x and what is y

Mathematics

1 answer:

weeeeeb [17]3 years ago

6 0

X=1; so then y must = 4

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here is another one that i need help on What number represents the same amount as 7 hundreds + 0 tens + 100 ones

Stels [109]

7 hundreds= 7x100=700
100 ones= 100x1= 100

700+100=800

answer= 800.

hope this helps:)

8 0

3 years ago

Read 2 more answers

Car is moving on a circle on a plane. At time t (seconds), its x-coordinate is given by x(t) = 10 sin(200t + 3) + 30 while its y

Aleks [24]

Answer:

we have centre of circle as (30,40) and radius = 1

Step-by-step explanation:

Given that a car is moving on a circle on a plane.

At time t (seconds),

$x(t) = 10 sin(200t + 3) + 30$

and

$y(t) = 10 cos(200t + 3) + 40$

$x-30 = 10 sin(200t + 3) \\y-40 = 10 cos(200t + 3) + 40$

when we square and add both the equations we get

$(x-30)^2 + (y-40)^2 = 1$

(since sin square + cos square = 1 always)

i.e. we have centre of circle as (30,40) and radius = 1

3 0

3 years ago

Katalin drove 210 miles on her vacation. She drove an average of 1.4 times faster on the second 105 miles of her trip than she d

konstantin123 [22]

The answer is D. 180 divided by x. .

5 0

3 years ago

Write a formula for the maximum number of segments determined by n points

jeyben [28]

Let n = the number of points
(x-1) + ... (x-x)

The last term will always be 0, when you reach that, stop.

ex. 1pt: 1-1=0
2pt: (2-1) + (2-2) = 1
3pt: (3-1) + (3-2) + (3-3) = 3

7 0

3 years ago

Read 2 more answers

sandra raised 15 dollars for pta and nita raised 45 dollars how many times as much money did nita raise as compared to sandra

OlgaM077 [116]

Answer:

3 times (3x)

Step-by-step explanation:

Sandra raised 15 dollars.

Nita raised 45

45 divided by 15 is 3

3 * 15 = 45

7 0

2 years ago