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3 years ago

What is i hcf of 21 and 28

Mathematics

2 answers:

olchik [2.2K]3 years ago

7 0

$21|3 \\ 7 \ |7 \\ 1 \\\\ 21=3*7 \\\\ 28|2 \\ 14|2 \\ 7 \ |7 \\ 1 \\\\ 28=2^2*7 \\\\ H.C.F(21;28)\to\boxed{7}$

alexira [117]3 years ago

5 0

The factors of 21 are 1, 3, 7, and 21 .

The factors of 28 are 1, 2, 4, 7, 14, and 28 .

The factors common to both numbers are 1 and 7 .

The greatest one is <em> 7</em>.

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14 points someone please help me quick!

Shtirlitz [24]

The E3 is the same as writing 10^3.

The answer would be 7.9 x 10^3

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4 years ago

Four runners start at the same point; Lin, Elena, Diego, Andre. For each runner write a multiplication equation that describes t

Helen [10]

Answers:

Lin's finish point is at 205 meters

Elena's velocity is 8.92 meters per second

Diego's finish point is at -259.2 meters or 259 meters behind the start

Andre's velocity is -8.14 meters per second

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2 years ago

−3(2+4k)+7(2k−1) eqivalent expression

Alex17521 [72]

Answer:

$\large\boxed{-3(2+4k)+7(2k-1)=2k-13}$

Step-by-step explanation:

$-3(2+4k)+7(2k-1)\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\=(-3)(2)+(-3)(4k)+(7)(2k)+(7)(-1)\\\\=-6-12k+14k-7\qquad\text{combine like terms}\\\\=(-12k+14k)+(-6-7)\\\\=2k-13$

6 0

3 years ago

15+ POINTS FOR BEST ANSWERS!!!!!

Varvara68 [4.7K]

Your guesses are correct.

3 0

3 years ago

Read 2 more answers

I dont understand how to do this inequality 4x +6 <-6

Mama L [17]

4x + 6 < -6

First, subtract 6 from both sides. / Your problem should look like: 3x < -6 - 6
Second, simplify -6 - 6 to -12. / Your problem should look like: 3x < -12
Third, divide both sides by 4. / Your problem should look like: x < $-\frac{12}{4}$
Fourth, simplify $\frac{12}{4}$ to 3. / Your problem should look like: x < -3

Answer: x < -3
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4 years ago