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3 years ago

Solve the system by substitution. -5x+3y=2 Y=2x

Mathematics

1 answer:

Volgvan3 years ago

8 0

Answer:

2 is the required answer.

Step-by-step explanation:

Solution:

Given:

-5x+3y=2..............(i)

Putting the value of y=2x in the equation (i); we get:

i.e -5x+3×2x=2

or, -5x+6x=2

or, x=2

i.e. x=2

y=2x=2×2=4

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The distance around the middle of a sphere (the circumference) equals 37.699 in. what is the surface area of the sphere?

podryga [215]

To solve this problem you must apply the proccedure shown below:

1. Clear the radius from the formula for the circumference of a circle and substitute values, as following:

$C=2\pi r\\ r=C/2\pi \\ r=37.699in/2\pi \\ r=5.99in$

2. Substitute the radius calculated into the formula for calculate the surface area of the sphere:

$SA=4\pi r^{2} \\ SA=4\pi(5.99in^{2})\\ SA=450.88in^{2}$

The answer is: $450.88in^{2}$

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3 years ago

Can someone please help, I’ll mark as brainliest

BaLLatris [955]

Answer: (3,inf)

(-inf,3)

Step-by-step explanation:

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3 years ago

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Ksenya-84 [330]

Answer:

6.7-(-2.5)=9.2 6.7+(-2.5)=4.2 Neither

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3 years ago

There were 350 members in the high school marching band last year. This year, the number of marching band members increased by 5

Rudiy27

Answer:

The percentage of the number of marching band members increased by 16% this year.

Step-by-step explanation:

$\frac{56}{350}$ x 100% = 16%

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3 years ago

Read 2 more answers

Will mark brainliest if you show ur work

Tanzania [10]

Answer:

$\boxed{\bold{One \ Solution}}$

Step-by-step explanation:

Solve equation to find answer(s)

Combine: 6z - 3z = 3z

$\bold{3z-7=-2+3}$

Add: -2 + 3 = 1

$\bold{3z-7=1}$

Add 7 to both sides:

$\bold{3z-7+7=1+7}$

Simplify:

$\bold{3z=8}$

Divide both sides by 3:

$\bold{\frac{3z}{3}=\frac{8}{3}}$

Simplify:

$\bold{z=\frac{8}{3}}$

- M -

8 0

3 years ago