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3 years ago

Circumference and Area of Circles

Mathematics

1 answer:

yanalaym [24]3 years ago

8 0

Step-by-step explanation:

Area of a circle = #r^2

1256 = 3.14 × r^2

r^2 = 1256/3.14

r^2 = 400

Square root of r = 20

Diameter = 2 × r = 2 × 20 = 40 inches

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100 POINTS HELP ASAP Linear Combination

notka56 [123]

Answer:

1) $x=\dfrac12$

2) $n = -3 \ \ \textsf{and} \ \ m = -4$

3) see below

4) A: 0 = 1

Step-by-step explanation:

Question 1

$15-0.5(4x-2)+4x=17$

$\implies 15-2x+1+4x=17$

$\implies 2x+16=17$

$\implies 2x=1$

$\implies x=\dfrac12$

Question 2

$\textsf{rearrange} \ n=m+1 :$

$\implies -m=-n+1$

$\textsf{add equations} \ -m=-n+1 \ \textsf{and} \ m=2n+2:\\$

$\implies0=n+3$

$\implies n=-3$

$\textsf{substitute} \ \ n=-3 \ \ \textsf{into} \ \ m=n-1:$

$\implies m=-3-1$

$\implies m=-4$

Question 3

subtract the second equation from the first

divide both sides by -4

substitute found value for y into first equation

solve for x

Question 4

$3j=k$

$k=3j+1$

$\textsf{rearrange} \ 3j=k :$

$\implies -k=-3j$

$\textsf{add equations}\ -k=-3j \ \ \textsf{and}\ \ k=3j+1:$

$\implies 0=1$

Solution = A

6 0

2 years ago

Write on equation if the slope is 3/4 and the y-intercept is -4,

KonstantinChe [14]

Answer:

thw abswer os tywentr yaxel

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

X2 = 121 Please HELP!!!

Allushta [10]

The answer will be
x=root 121
x=11

3 0

2 years ago

Read 2 more answers

Simplify: -5 + 3a + 6 - 4a.

MatroZZZ [7]

Answer:

-a+11

Step-by-step explanation:

hard to explain. but should be correct

4 0

3 years ago

Y'ALL! WHAT IS: 46(74 + 46) + 57(9 + 36)

koban [17]

Answer:

331

Step-by-step explanation:

Add 74 + 46 + 57 = 177

Add 9 + 36 = 45

Add 45 + 46 = 91

6 0

2 years ago