3 years ago

When servicing a heating boiler and radiators, a plumber knows that the time

1 answer:

3 0

£110 as 45mins times 4 radiators divided by 60 mins =3 hours

3 hours + 1 hour = 4 hours
4 hours times £20= £80
£80+£30=£110

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In ΔMNO, the measure of ∠O=90°, MO = 15, ON = 8, and NM = 17. What ratio represents the cosine of ∠N?

Nesterboy [21]

Answer: The required ratio would be $8:17.$

Step-by-step explanation:

Since we have given that

∠O=90°,

MO = 15, (Perpendicular)

ON = 8, (Base) and

NM = 17 (Hypotenuse)

So, we need to find the cosine of ∠N.

As we know that

$\cos N=\dfrac{Base}{Hypotenuse}\\\\\cos N=\dfrac{8}{17}$

Hence, the required ratio would be $8:17.$

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4 years ago

E/P 14)The equation 2x²+ 4kx - 5k = 0, where k is a constant, has no real roots.

aalyn [17]

Step-by-step explanation:

Discriminant = 16k² - 4(2)(-5k)

Since 16k² + 40k < 0, 2k² + 5k < 0, k(2k + 5) < 0.

Therefore -5/2 < k < 0.

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3 years ago

How much red paint and blue paint do you use to make 20 cups of purple paint?

Iteru [2.4K]

Answer:

To get 20 cups of purple paint, the table shows that we need 8 cups of blue paint and 12 cups of red paint. We can solve the problem using double (or triple) number lines.

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3 years ago

5 x 100 + 4 x 10 + 6 x 1 + 2 x ( 1/10) + 8 x ( 1/1000) =?

Alexus [3.1K]

Answer:

68276/125

Step-by-step explanation:

500+40+6+1/5+1/125

546+26/125

68276/125

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3 years ago

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lukranit [14]

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