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3 years ago

What is the length of the hypotenuse of the triangle below?

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

4 0

Answer:

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

The square oh the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

h² = (9 $\sqrt{2}$ )² + (9 $\sqrt{2}$ )² = 162 + 162 = 324 ( take the square root of both sides )

h = $\sqrt{324}$ = 18 → D

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London has a collection of 260 coins. How many coins represent 25% of her collection?

Sergeu [11.5K]

Answer:

65 coins

Step-by-step explanation:

Set this problem up with a porportion.

$\frac{?}{260} \frac{25}{100}$

After that, cross multiple and divide.

25 times 260. Then divide by 100. That is then your answer.

8 0

3 years ago

Write this number<br> 7 ones, 2, tens, 3 hundreds

nydimaria [60]

Answer:

327

Step-by-step explanation:

7 ones = 7*1 = 7

2 tens = 2*10 = 20

3 hundreds = 3 * 100 = 300

300 +20 +7 = 327

3 0

3 years ago

There is a line whose slope is 7 and whose y-intercept is -5. why is it's equation in slope-intercept form?

Troyanec [42]

Answer:

y = 7x - 5

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = 7 and c = - 5, then

y = 7x - 5 ← equation of line

3 0

3 years ago

Please help! Kylie is 231 miles away from Anna. They are traveling towards each other. If Anna travels 9 mph faster than Kylie a

Andrej [43]

A will represent Anna. k will represent Kylie.

7a+7k=231
a=9+k

Substitute for a
7(9+k)+7k=231
63+7k+7k=231
14k=168
k=12

Then plug in the k value
a=9+12
a=21

Final answer: Anna=21 mph, Kylie= 12 mph

7 0

3 years ago

Solve for n. Round to the tenths place, if necessary.

slega [8]

N = 14.4

so it would be "B"

24 x 5.85 = 140.4

9.75 x n = 9.75n

140.4/9.75 = 14.4
n=14.4

5 0

3 years ago