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3 years ago

3. Amanda has 5 pieces of wire that are each 15 % feet long. She wants to cut the wire into 3%

Mathematics

1 answer:

nataly862011 [7]3 years ago

8 0

Answer:sorry man i j

Step-by-step explanation:

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A pet supplier has a stock of parakeets of which 20% are blue parakeets. A pet store orders 3 parakeets from this supplier. If t

Levart [38]

Answer:

0.384

Step-by-step explanation:

pet supplier has a stock of parakeets of which 20% are blue parakeets

20/100 = 0.2 blue parakeets (success)

1-0.2 = 0.8 not parakeets (not success)

A pet store orders 3 parakeets from this supplier

we need to find the chance of getting exactly one blue from 3 parakeets

$P(x=1)=nCr (p)^r(q)^{n-r}$

n=3, r=1, p = 0.2 , q=0.8

$P(x=1)=3C1 (0.2)^1(0.8)^{2}$

0.384

5 0

2 years ago

43. Para determinar la altura de un árbol nos apoyamos en los siguientes triángulos semejantes que se forman entre el árbol y

MArishka [77]

Respuesta:

A.) BA = 12 m

Explicación paso a paso:

Usando triángulos similares:

BA / AC = DE / EC

BA = x; AC = 20; DE = 3; EC = 5

POR ESO ; TENEMOS :

x / 20 = 3/5

Multiplicar en cruz:

5 * x = 20 * 3

5 veces = 60

5x / 5 = 60/5

x = 12

3 0

2 years ago

Need help can someone plz help me solved this problem ASAP! Need help I will mark you as brainiest

Lapatulllka [165]

Answer: 24, 33

2.5, 4.75

9.5, 11.75

Step-by-step explanation:

It is given that the PERIMETER is BETWEEN 24 and 33

--> 24 < P < 33

Graph: O------------------O

24 33

Perimeter = 2w + 2L

It is given that L = w + 7

Substitute P with 2w + 2L and substitute L with w + 7

24 < 2w + 2(w + 7) < 33

24 < 2w + 2w + 14 < 33

10 < 4w < 19

--> 2.5 < w < 4.75

Graph: O--------------------------O

2.5 4.75

Since L = w + 7, then w = L - 7

Substitute P with 2w + 2L and substitute w with L - 7

24 < 2(L - 7) + 2L < 33

24 < 2L + 2L - 14 < 33

38 < 4L < 47

--> 9.5 < L < 11.75

Graph: O------------------------O

9.5 11.75

NOTE: Make sure you use OPEN dots on the graphs.

3 0

2 years ago

What are the roots of the quadratic equation below? x2 + 2x= -5

muminat

Answer:

No real root.

Complex roots:

$x = -1 \pm 2i$

Step-by-step explanation:

$x^2 + 2x = -5$

$x^2 + 2x + 5 = 0$

There are no two integers whose product is 5 and whose sum is 2, so this trinomial is not factorable. We can use the quadratic formula.

$x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$x = \dfrac{-2 \pm \sqrt{2^2 - 4(1)(5)}}{2(1)}$

$x = \dfrac{-2 \pm \sqrt{4 - 20}}{2}$

$x = \dfrac{-2 \pm \sqrt{-16}}{2}$

Since we have a square root of a negative number, there are no real roots. If you have learned complex numbers, then we can continue.

$x = \dfrac{-2 \pm 4i}{2}$

$x = -1 \pm 2i$

7 0

2 years ago

Read 2 more answers

Please explain how to get answer in sq units of parallelogram ABCD

Lostsunrise [7]

Hey there :)

Assuming you are asking how to find the area of parallelogram ABCD:

We know the area formula of a parallelogram:
Area = base x height

Then apply the formula to the given.

7 0

2 years ago