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Kruka [31]
2 years ago
9

On a test with 30 questions, Bill answered 80% correctly. How many answers did he get wrong?

Mathematics
1 answer:
AveGali [126]2 years ago
5 0

Answer:

30 X .8=24 30-24=6 bill got 6 questions wrong

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A triangle has sides with lengths of 6 inches, 13 inches, and 17 inches. Is it a right triangle?
Tems11 [23]

Answer:

Nope

Step-by-step explanation:

To now if a triangle is a right angle, use Pythagoras Theorem,

a^2 + b^2 = c^2

C usually be the longest side of the triangle, C = 17

Then also let a and b be 6 and 13 respectively.

6^2 + 13^2 =205

C^2 = 205

C = sqrt(205) = 14.32

therefore no this is not a right angle triangle

4 0
2 years ago
Please someone help me with this
shtirl [24]

Answer:

2,-1.5

Step-by-step explanation:

To find the midpoint of a line segment, take the average of the x coordinates and y coordinates of the two points that make it up.

\frac{2+2}{2} ,\frac{4+(-7)}{2}

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7 0
3 years ago
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5 consecutive house numbers in a
ELEN [110]

Answer:

81

Step-by-step explanation:

by dividing the smallest number from the bigger number to get the last house

8 0
2 years ago
Which figure has the largest shaded region?
lions [1.4K]

Answer:

is A

Step-by-step explanation:

6 0
2 years ago
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The amount, A, in milligrams, of radioactive material remaining in a container can be modeled by the exponential function A(t) =
lisov135 [29]

Answer: 4 years


Step-by-step explanation:

A(0) has to be amount at start. Assume that's 5mg

Then A(t) = 5×(0.5)^(0.25t) = 5×2^(-t/4),

(also known as 5 exp(-λ t) with λ = ln(2)/4, incidentally).


We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.



4 0
3 years ago
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