All categories

2 years ago

(d)find the hcf of 21 and 84

Mathematics

2 answers:

Oxana [17]2 years ago

7 0

I m not sure about my ans.

nata0808 [166]2 years ago

6 0

Step-by-step explanation:

$21 = 3 \times 7 \\ \\ 84 = 2 \times 2 \times 3 \times 7 \\ \\ common \: factors \: = 3 \: and \: 7 \\ \\ \therefore \: hcf \: of \: 21 \: and \: 84 = 3 \times 7 = 21$

You might be interested in

U=1-3v/vt-w make t the subject

Jobisdone [24]

$u = 1 - \dfrac{3v}{vt-w}$

$\dfrac{3v}{vt-w} = 1 - u$

$3v = (1 - u)(vt - w)$

$3v = vt - w - uvt + wu$

$vt - uvt = 3v + w - wu$

$t(v - uv) = 3v + w - wu$

$t = \dfrac{3v + w - wu}{v - uv}$

8 0

2 years ago

Watch help video

alisha [4.7K]

Answer:

- 179 ft

Step-by-step explanation:

Start elevation is 0 ft

Change of position after 50 seconds

50*4.5 = 225 ft

Elevation now

0 - 225 = - 225 ft

Change of position after 92 seconds

92*0.5 = 46 ft

Final elevation

- 225 + 46 = - 179 ft

5 0

2 years ago

Please help and show work so I can understand how too alive this question please

nataly862011 [7]

Answer:

she has 24 shoes

Step-by-step explanation:

12 x 2(pair)=24

8 0

2 years ago

Write an algebraic expression for the verbal expression<br> the quotient for 45 and r

Nimfa-mama [501]

Answer:

45/r

Step-by-step explanation:

You're just doing 45 divided by r.

4 0

2 years ago

Increase £110 by 10%

UNO [17]

Answer:

121

Step-by-step explanation:

Find 10% of 110: $\frac{10}{100}$ × $\frac{110}{1} = \frac{11}{1} = 11$
Increase means add: 110 + 11 = 121

8 0

3 years ago

Read 2 more answers

(d)find the hcf of 21 and 84​

(d)find the hcf of 21 and 84