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Pepsi [2]
3 years ago
7

\div \sqrt{3} " alt=" \sqrt{21 } \div \sqrt{3} " align="absmiddle" class="latex-formula">
Mathematics
1 answer:
melamori03 [73]3 years ago
6 0

Answer:

\sqrt{7}

Step-by-step explanation:

Using the rule of radicals

\sqrt{\frac{a}{b} } ⇔ \frac{\sqrt{a} }{\sqrt{b} }

\frac{\sqrt{21} }{\sqrt{3} } = \sqrt{\frac{21}{3} } = \sqrt{7}


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A 30-m tall building casts a shadow. The distance from the top of the building to the tip of the shadow is 32 m. Find the length
zepelin [54]

Answer: 11.1 m

Step-by-step explanation:

This can be solved by the Pythagorean theorem where;

c² = a² + b²

c is the hypotenuse which is the distance from the top of the building to the tip of the shadow.

a is the height

c is the length

32² = 30² + b²

b² = 32² - 30²

b² = 1,024 - 900

b² = 124

b = √124

b = 11.1 m

7 0
3 years ago
The first two diamonds are filled in, can you figure out how the numbers are related when
balu736 [363]

Answer:

Step-by-step explanation:

Upper box in the diamond: Add the two numbers  ⇒ (-2) + 3 = -1

Bottom box in the diamond : Multiply the two numbers ⇒ (-2) * 3 = -6

3) Upper box = (-6) +  (-3)  = (-9)

Bottom box = (-6) *(-3) = 18

4) Upper box  = 1 +(-11) = -10

 Bottom box = 1 *(-11) = -11

5) Upper box = 7+8 = 15

Bottom box = 7*8 = 56

7 0
2 years ago
Approximately 2\%2%2, percent of the people in the world have red hair. There are about 7{,}000{,}000{,}0007,000,000,0007, comma
weqwewe [10]
Find 2% of 7 billion.

7,000,000,000 x .02 = 140,000,000

About 140 million people have red hair.
3 0
3 years ago
Find three different integer solutions to the equation -3x-y=-1
pshichka [43]

Answer:

The integers are -3, x, and -y

Step-by-step explanation:

7 0
3 years ago
Katie it making necklaces. She has 1/3 of blue ribbon 3/4 yard of pink ribbon & 7/8 yard of green ribbon. write the ribbon l
german
In order from greatest to least, the ribbons go

7/8 (Green)
3/4 (Pink)
1/3 (Blue)

This because 7 out of 8 is a larger number than 3 out of 4, and 3 out of 4 is greater than 1 out of 3.
8 0
3 years ago
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