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3 years ago

Please Help!! Brainliest Answer! Thank you!

Mathematics

2 answers:

satela [25.4K]3 years ago

7 0

We have a square here. All angles are congruent (90 degrees) so 20x would equal 90 degrees
20x=90
x=4.5
Now let’s double check
20x
20(4.5)
90
Yep the answer is choice B) x=4.5

I am Lyosha [343]3 years ago

4 0

Answer:

x=4.5

Step-by-step explanation:

The sum of all the angles in a square=360°

20(4.5)=90

90×4=360

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The average distance from the sun to the planet Mercury is about 58,000,000 km. The diameter of a human hair is about 0.0025 cm.

Anna [14]

Answer:

Distance of Sun and Mercury = 58,000,000 km.

In Scientific notation, it would be: 5.8 × 10⁷ Km

Diameter of a human hair = 0.0025 cm

In scientific notation, it would be: 2.5 × 10⁻³ cm

Before Comparison, we need to bring to or vice-versa, so we can easily calculate then, here, we will go from cm to Km.

2.5 × 10⁻³ × 10⁻⁵ Km = 2.5 × 10⁻⁸

Now, we can compare the values,

5.8 × 10⁷ Km > 2.5 × 10⁻⁸

[ reason. - power of smaller number is in negative, it means, it is denominator, which would be very small as compared to other ]

5 0

3 years ago

Read 2 more answers

Find the area of the partial circle. use 3.14 for pi.

nignag [31]

Radius=1cm=r

Thats a semi circle

Area

πr²/2
π(1)²/2
π/2
3.14/2
1.57cm²

6 0

2 years ago

Juan and Nina are in the Junior High Orchestra. As part of the orchestra they each have to learn two instruments. Juan is learni

Whitepunk [10]

Answer:

Nina practiced the viola for 11.25 hours last week.

Step-by-step explanation:

Juan practiced the violin for 9 hours last week. For each 3 hours that he practices the violin, he practices 2.5 hours of cello. So

3h violin - 2.5h cello

9h violin - xh cello

$3x = 9*2.5$

$x = 7.5$

He practiced 7.5 hours of cello, the same as Nina.

For every 3 hours Nina spends practicing the viola she practices the cello for 2 hours. So:

3h viola - 2h cello

xh viola - 7.5h cello

$2x = 3*7.5$

$x = 7.5*1.5$

$x = 11.25$

Nina practiced the viola for 11.25 hours last week.

3 0

3 years ago

Please help! 10th grade geometry

yuradex [85]

Answer:

m∠C = 118°

Step-by-step explanation:

180 - 56 = 124°

124 ÷ 2 = 62°

180 - 62 = 118°

m∠C = 118°

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2 years ago

a circle with radious of 1cm sits inside a 11cm times 12 cm rectangle what is the area of the shaded region

Nitella [24]

Answer: 128.86cm²

Step-by-step explanation:

The circle is inscribed in the rectangle. To find the shaded portion, subtract he area of the circle from the are of the rectangle.

Area of the rectangle = 11 x 12

= 132cm²

Area of the circle with radius of 1cm = πr²

= 3.142 x 1²

= 3.142cm²

Therefore , area of the shaded region = 132cm² - 3.142cm²

= 128.86cm²

7 0

3 years ago

Read 2 more answers