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2 years ago

What is the measure of 21? 100° 90° 80° 85° 95%

Mathematics

1 answer:

Scorpion4ik [409]2 years ago

8 0

Answer:

A quadrilateral's interior angles have a sum of 360°.

Given that we have 85°, 100°, and 90°(the right angle), and an unknown angle.

We can add these angles plus the unknown angle to equal a total of 360°.

85 + 100 + 90 + x(our unknown missing angle) = 360

simplify

275 + x = 360

Isolate x by subtract 275 from both sides;

-275 -275

x = 85, ∠1 = 85°

We can also double check:-

85 + 100 + 90 + 85 = 360

360 = 360 which is correct.

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2 years ago

Explain why if a runner completes a 6.2â-mi race in 32 âmin, then he must have been running at exactly 11 âmi/hr at least twice

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Answer:

Accelerating to top speed, deaccelerating to finish line.

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3 years ago

Which function is a quadratic function?

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The correct answer is: [C]: " c(x) = –8x² + 3x – 5 " .
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The quadratic function takes the form of:
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" f(x) = ax² + bx + c " .
_________________________________________________________
Answer choice: [C]: " c(x) = –8x² + 3x – 5 " ;

is the only answer choice provided that takes that form of the quadratic function:

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2 years ago

For Valentine's Day, Kelsey got a box of 24 chocolates. After one week, she'd eaten 5/8 of them. How many chocolates had Kelsey

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Answer:

She had eaten 15 chocolates.

Step-by-step explanation:

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3 years ago

Rename the decimal numbers as a fraction. 1.0.15 2.0.37. 3.0.5 4. 1.38 5.0.4

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Answer:

See image

Step-by-step explanation:

You put One-place decimals over ten and then simplify.

You put Two-place decimals over 100 and then simplify. See image.

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2 years ago

What is the measure of 21? 100° 90° 80° 85° 95%​

What is the measure of 21? 100° 90° 80° 85° 95%