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2 years ago

£200 into the ratio 3:5

1 answer:

3 0

Add up the ratio so 3+5 which gives you 8. Then divide the total money by how many parts.
200/8=25
25x3=75
25x5=125
Answer:75:125

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Write the measurements of Sides AB, BC, and CD of the correct net.

scZoUnD [109]

AB- 3in.
BC- 5in.
CD- 7.2in.

sorry i don't really have an explanation I just looked at the picture and i guess imagined it in my head? lol sorry but here are the answers I hope that helps at least a little bit :))

8 0

2 years ago

Read 2 more answers

What is the answer to 18 - 3w = 4w

adelina 88 [10]

Answer:

Step-by-step explanation:

$18 - 3w = 4w$

Let's get all of the terms with the $w$ on the right-hand side of the equation, and everything else on the left-hand side of the equation.

To do this, we should add $3w$ to both sides of the equation to remove the $-3w$ from the left-hand side of the equation:

$18 - 3w + 3w = 4w + 3w$

$18 = 7w$

Finally, to get the $w$ by itself, we can divide both sides by $7$ :

$\frac{18}{7} = \frac{7w}{7}$

$w = \frac{18}{7}$

4 0

3 years ago

The model builder has 4 pieces of balsa wood that are 4 cm, 5 cm, 6 cm, and 7 cm length. How many different combinations of 3 pi

s2008m [1.1K]

About 22 i think hope it helps in any way

7 0

3 years ago

El jefe de ventas comenta con tu padre que los 9.000 vehículos del mes pasado suponen unos buenos resultados, pero que este mes

Alja [10]

Answer:

900

Step-by-step explanation:

10% de 9000 es 900

Trabajando el 10% de 9000

Escribe 10% como 10100

Dado que, encontrar la fracción de un número es lo mismo que multiplicar la fracción por el número, tenemos

10100 de 9000 = 10100 × 9000

Por tanto, la respuesta es 900

Si está utilizando una calculadora, simplemente ingrese 10 ÷ 100 × 9000, lo que le dará 900 como respuesta.

6 0

2 years ago

A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get

julsineya [31]

I have an expression

$\sigma = \sqrt{p(1-p)/n}$

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

$E( (b-p)^2 ) = (-p)^2(1-p) + (1-p)^2p = p(1-p)$

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

$\sigma = \sqrt{p(1-p)/n}$

Plugging in the numbers,

$\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%$

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

7 0

3 years ago