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4 years ago

Can you guy help me please

Mathematics

1 answer:

nordsb [41]4 years ago

7 0

For number 25 it’s x=4 and for 26 it’s x=7

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The spokes of a bicycle wheel form 10 congruent central angles. The diameter of the circle formed by the outer edge of the wheel

Yuki888 [10]

Answer:

$5.6$ inches.

Step-by-step explanation:

The length of the outer edge of the wheel between two consecutive spokes is given by;

$l=d\sin(\frac{\theta}{2} )$

where d=18 inches.

and

$\theta=\frac{360\degree}{10}=36\degree$ is the central angle.

We substitute the values to obtain;

$l=18\sin(\frac{36\degree}{2})$

$l=18\sin(18\degree)$

$l=5.562305899$

$l=5.6$ inches to the nearest tenth.

8 0

4 years ago

LCD to rewrite 5/9 and 1/6 with the same denominator.

Margaret [11]

Answer:

10/18 and 3/18

3 0

3 years ago

Read 2 more answers

639: divide 9 is can some answer my question please

k0ka [10]

639÷9=71. You can check your answer by doing 71x9=639

4 0

3 years ago

Read 2 more answers

Anya was rowing up the river and noticed it takes longer to row upstream than downstream. She knows that in still water she can

Alenkinab [10]

If the speed of boat in still water iss 9 mph and takes 1.5 miles to go and come 4 miles uptream and downward then the current of the river is 9.24 mph.

Given that the speed in still water be 9 mph, time to travel 4 miles upstream and downward is 1.5 hours.

We are required to find the speed of current of the river.

let the speed of current be c mph.

Effective speed in downstream=9+c

Effective speed in upstream=9-c

Total time=1.5 hours.

Total distance=4 miles.

Time for upstream stream+ time for downward stream=1.5 hours

2/(9+c)+2/(9-c)=1.5

18-2c+18+2c=1.5(9+c)(9-c)

36=1.5(81- $c^{2}$ )

36=121.5-1.5 $c^{2}$

1.5 $c^{2}$ =121.5-36

$c^{2}$ =85.5

c=9.24 mph.

Hence the speed of the current of the river is 9.24 mph.

Learn more about speed at brainly.com/question/4931057

#SPJ4

4 0

2 years ago

7. A kite in the shape of a square with a diagonal 32 cm and an isosceles triangle of base 8 cm and sides 6 cm each is to be mad

grin007 [14]

Answer:

Step-by-step explanation:

diagonal = 32 cm

Area of square = $\dfrac{d^{2}}{2}$

$=\dfrac{32*32}{2}\\\\=512 \ cm^{2}$

Diagonal separate the square into two equal triangles.

Area of upper triangle that is shaded black = area of lower triangle = 512/2

= 256 cm²

Isosceles triangle:

a = 6 cm ; b = 6 cm c = 8cm

$s = \dfrac{a+b+c}{2}\\\\=\dfrac{6+6+8}{2}\\\\=\dfrac{20}{2}\\\\=10\\\\s-a = 10 - 6 = 4 \ cm\\\\s-b = 10-6 = 4 \ cm\\\\c - c = 10 - 8 = 2 \ cm\\\\Area = \sqrt{s*(s-a)(s-b)(s-c)}\\\\=\sqrt{10*4*4*2}\\\\=\sqrt{2 * 2 * 4 * 4 * 5}\\\\=4*2\sqrt{5}\\\\=8\sqrt{5}\\\\=8*2.24\\\\=17.92 \ cm^{2}$

Area of black shade paper = 256 + 17.92 = 273.92 cm²

Area of white shade paper = 256 cm²

Area of the isosceles triangle = s(s-a)(s-b)(s-c)

7 0

3 years ago