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2 years ago

Evaluate in a clever way.(7.07+70.007+7.0007+700)÷7

Mathematics

2 answers:

zaharov [31]2 years ago

7 0

It is 112.0111 because if you do inside the parentheses it will be 784.0777 and then divide by 7 so it equals 112.0111

olga2289 [7]2 years ago

5 0

It's 112.0111

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Can any help me please

PSYCHO15rus [73]

A = 8i + 6j
b = 4i + 5j

ab = (8i + 6j)(4i + 5j)
ab = 8i(4i + 5j) + 6j(4i + 5j)
ab = 8i(4i) + 8i(5j) + 6j(4i) + 6j(5j)
ab = 32i² + 40ij + 24ij + 30j²
ab = 32i² + 64ij + 30j²
ab = <32, 30>

The answer is D.

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2 years ago

a car traveling at 30 m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is its acceleration?

creativ13 [48]

Just divide -30 m/s (the change in velocity) by 12 seconds (the time required for the car to come to a stop):

-30 m/s
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2 years ago

What is the product in simplest form? −8/9⋅5/6 <br> A.−1 <br> B.−13/15 <br> C.−20/27 <br> D.−15

nalin [4]

The answer is C.
hope this helps!

5 0

2 years ago

Read 2 more answers

You have a fishing line spool with an end that has an area of 20.0 cm2. how much fishing line do you need to wind around the spo

grandymaker [24]

Answer: 158.53 cm

Step-by-step explanation:

We know that the ends of a fishing line spool are circular in shape.

Given : The area of an end of fishing line spool = $20.0\cm^2$ (1)

Area of a circle = $\pi r^2$ (2)

Circumference of a circle = $2\pi r$ (3)

, where r is radius of the circle.

From (1) and (2), we have

$\pi r^2=20\\\\\Rightarrow\ r^2=\dfrac{20}{\pi}\\\\\Rightarrow\ r=\sqrt{\dfrac{20}{\pi}}$

Circumference of fishing spool = $2\pi r$ (using (3))

$=2\pi \sqrt{\dfrac{20}{\pi}}=2\sqrt{20\pi}=2\times2\sqrt{5\pi}=4\sqrt{5\pi}$

i.e. Fishing spool required to wind around the spool one time $=4\sqrt{5\pi}\ cm$

⇒ Fishing spool required to wind around the spool 10 times $=10\times4\sqrt{5\pi}\ cm=40\sqrt{5\pi}\\\\=40\times\sqrt{5}\times \pi\\\\=40\times2.236\times\sqrt{3.14159}\\\\=89.44\times1.772453\\\\=158.528205473\approx158.53\ cm$

Hence, you need 158.53 cm or about 159 cm of fishing line to wind around the spool 10 times.

7 0

2 years ago

Factor the polynomial using the pattern x^2-12x+27

Harlamova29_29 [7]

Answer:

(X-9)(x-3)

Step-by-step explanation:

7 0

2 years ago