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3 years ago

6

Help please like hurry I’ve been out of school for 8 months just dumped us in another school never done Algebra in my life and t

hey said if I don’t finish this packet I will get a 0

1 answer:

adelina 88 [10]3 years ago

7 0

1.64
2. 225
3.9x^8
4. 16a^4
5. 1
6. 216
7. 64r^21
8. 256
9. 216
10. 144
11. -8
12.1

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Can someone plz help me with this? <br> Which polygons are similar?

earnstyle [38]

The first one I believe!

7 0

3 years ago

In ΔABC, if AB = 14 and BC = 9, AC may be equal to

Pie

Answer:

AC could be any number of these numbers 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22

Step-by-step explanation:

There is a fact in any triangle:

<em>The length of any side of a triangle must be greater than the difference of the lengths of the other two sides and smaller than the sum of the lengths of the other two sides</em>

If the lengths of the three sides of a triangle are a , b and c, then

a - b < c < a + b
b - c < a < b + c
a - c < b < a + c

In Δ ABC:

→ (BC) - (AC) < AB < (BC) + (AC)

→ (AB) - (AC) < BC < (AB) + (AC)

→ (AB) - (BC) < AC < (AB) + (BC)

∵ AB = 14 units

∵ BC = 9 units

- Find the sum and difference of them

∵ AB - BC = 14 - 9

∴ AB - BC = 5

∵ AB + BC = 14 + 9

∴ AB + BC = 23

- That means the length of AC could be any integer greater

than 5 and smaller than 23

∴ 5 < AC < 23

AC could be any number of these numbers 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22

5 0

3 years ago

Read 2 more answers

Find the distance d(P1, P2) between the points P1 and P2. P1 = (-5,3) P2 = (2,4) d(P1,P2) = (Simplify your answer. Type an exact

Reptile [31]

Answer:

distance between two points is

$5\sqrt{2}$

Step-by-step explanation:

the distance d(P1, P2) between the points P1 and P2

Use distance formula

$D= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

P1 = (-5,3) is (x1,y1) P2 = (2,4) is (x2,y2)

Plug in the values in the distance formula

$D= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\D= \sqrt{(2+5)^2+(4-3)^2}\\D= \sqrt{(7)^2+(1)^2}\\\\D= \sqrt{50}\\D=5\sqrt{2}$

7 0

3 years ago

HELP I NEED THE ANSWER

gladu [14]

Answer:

B

Step-by-step explanation:

2 walls are 30 x 9 and 2 walls are 20 x 9 and there are 4 units

30 x 9 = 270, 20 x 9 = 180

4(2)(270) + 4(2)(180) = 3600, so the answer is B

7 0

3 years ago

C) Three yam tubers are chosen at random from 15 tubers of which 5 are spoilt. Find the probability that, of the three chosen tu

Dmitry_Shevchenko [17]

$\displaystyle\\|\Omega|=\binom{15}{3}=\dfrac{15!}{3!12!}=\dfrac{13\cdot14\cdot15}{2\cdot3}=455$

a)

$\displaystyle\\|A|=\binom{10}{3}=\dfrac{10!}{3!7!}=\dfrac{8\cdot9\cdot10}{2\cdot3}=120\\\\P(A)=\dfrac{120}{455}=\dfrac{24}{91}\approx26.4\%$

b)

$\displaystyle\\|A|=\binom{5}{3}=\dfrac{5!}{3!2!}=\dfrac{4\cdot5}{2}=10\\\\P(A)=\dfrac{10}{455}=\dfrac{2}{91}\approx2.2\%$

c)

$\displaystyle\\|A|=\binom{10}{2}\cdot5=\dfrac{10!}{2!8!}\cdot5=\dfrac{9\cdot10}{2}\cdot5=225\\\\P(A)=\dfrac{225}{455}=\dfrac{45}{91}\approx49.5\%$

d)

$A$ - at least one is spoilt

$A'$ - none is spoilt

$P(A)=1-P(A')$

We calculated $P(A')$ in a).

Therefore

$P(A)=1-\dfrac{24}{91}=\dfrac{67}{91}\approx73.6\%$

7 0

2 years ago