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Alika [10]
3 years ago
10

I need help with both of them I'm confused...

Mathematics
2 answers:
mr_godi [17]3 years ago
6 0

Answer:

8) d

9) a

Step-by-step explanation:

8) C = d ·π

36 = d ·π

36 / π = d

9) 4π is the difference, which is 12.56

irga5000 [103]3 years ago
5 0
The first question is a and the second is a
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There is a L-shaped sidewalk that is 158 meters long. By cutting across the lawn, the
NikAS [45]

Answer:

Each side of the L-shaped sidewalk is 126 m and 32m respectively.

Step-by-step explanation:

Given:

Total length of the sidewalk = 158 meters

Cutting across the lawn the distance = 130 meters

The L-shaped lawn will be treated as a right angled triangle.

So the 130 m distance is the hypotenuse here.

Let one side of the L-shaped lawn be 'x' meter so the another side will be (158-x) meters.

Applying Pythagoras formula.

(Hypotenuse)^2=(height)^2+(base)^2

So,

⇒ (130)^2=x^2 +(158-x)^2

⇒ (130)^2=x^2+(158-x)(158-x)

⇒ 16900=x^2+24964-158x-158x+x^2

⇒ 16900 =2x^2-316x+24964

⇒ 2x^2+316x+24964-16900=0

⇒ 2x^2-316x+8064=0

⇒ x^2-158x+4032=0

Applying quadratic formula;

Quadratic formula : \frac{\pm b \sqrt{b^2-4ac} }{2a} where a=1 and b=-158 and c=4032

So the value of x= 126 and 32.

The length of each side of the sidewalk is 'x'= 126 m and '(158-x)'='(158-126)'=32 m

7 0
3 years ago
HELPPP PLEASEEE<br> g(t) = 6 - 1<br> g<br> -) = -7
DedPeter [7]

t is -1

g ( t ) = 6t-1

g (-1) = 6(-1)-1

= -6-1 = -7

6 0
3 years ago
HELP ASAP<br><br><br><br> -5 - k = -12<br> K=?
alexandr1967 [171]
The answer is K= 7 because
-5-7=-12
6 0
2 years ago
Read 2 more answers
A teacher is organizing her school supllies. she noticed that for every 2 pencils she has 7 pens. If she has 35 pens how many pe
Liula [17]

Answer:

10

Step-by-step explanation:

because 7÷35 =5 but that would be for only one pencil so if u multiply that 5×2 it would be 10 pencils

6 0
3 years ago
1. <br>Solve the quadratic equation using quadratic formula :<br><br>x2 – 7x + 12 = 0​
frez [133]

Answer:

x = 4 and 3

Step-by-step explanation:

[7±√(-7)²-4(1)(12)]/2

x = 4, 3

3 0
3 years ago
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