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4 years ago

Geometry help please

Mathematics

2 answers:

Andrei [34K]4 years ago

8 0

Use pythagorean theorem

c2 = a2+b2
c2 = 16^2 + 12^2
c2 = 256 + 144
c2 = 400
c = 20

Natasha2012 [34]4 years ago

8 0

The answer would be D because we use the Pythagorean theorem (A^2 + B^2 = C^2) to solve these kinds of problems. A=yz B=xd C=sqrt(A^2 + B^2). C=20

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2x+8y=12. 3x-8y=11 solve

gulaghasi [49]

Answer:

x = 23/5 and y = 7/20

Step-by-step explanation:

2x + 8y = 12 and 3x - 8y = 11 are two given equations

Now,

Step 1:

2x + 8y = 12 ...(1)

3x - 8y = 11 ...(2)

Step 2:

From equation (2) we get the value of x

i.e.,

3x - 8y = 11

3x = 8y + 11

x = 8y + 11/3

Step 3:

Now,

Put the value of x = 8y + 11/3 in equation (1) we get,

i.e.,

2x + 8y = 12

2(8y + 11/3) + 8y = 12

16y + 22/3 + 8y = 12

16y + 22 + 8y(3)/3 = 12

16y + 22 + 24y/3 = 12

16y + 24y + 22 = 12 * 3

40y = 36 - 22

40y = 14

y = 14/40

y = 7/20

Step 4:

Now,

Substitute the value of y = 7/20 in equation (2) we get,

i.e.,

3x - 8y = 11

3x - 8(7/20) = 11

3x - 56/20 = 11

3x - 14/5 = 11

3x = 11 + 14/5

3x = 11 * 5 + 14/5

3x = 55 + 14/5

3x = 69/5

x = 69/3 * 5

x = 23/5

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3 years ago

4. If f(x) = 3x + 2, find f(4)?

Romashka-Z-Leto [24]

Answer:

3(4)+2= 14

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

the students at Walden Middle school are selling tins of popcorn to raise money for new uniforms. they sold 42 tins in the first

Elis [28]

Answer:

$388.50

Step-by-step explanation:

9.25 * 42 = $388.50

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3 years ago

Sum of n terms 1x2+2x3+3x4+4x5+...

lozanna [386]

Answer:

1/3(n+1)³

Step-by-step explanation:

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=(1²+2²+3²+...+n²)+(1+2+3+...+n+1)=

=1/6n(n+1)(2n+1)+1/2(n+1)(1+n+1)=

=1/6(n+1)(n(2n+1)+3(n+2))=

=1/6(n+1)(2n²+4n+2)=

=1/6(n+1)*2(n+1)²=

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6 0

3 years ago

Simplify, 5(2x + 3y) - 4(3x - 5y)

borishaifa [10]

5(2x + 3y) - 4(3x - 5y)

5(2x) + 5(3y) - 4(3x) + 4(5y)

(10x + 15y) + (-12x + 20y)

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-2x + 35y

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3 years ago