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3 years ago

PLZ HELP MEE Which choice correctly shows how to use partial products to find 250×15

Mathematics

1 answer:

Anna007 [38]3 years ago

6 0

Your correct answer would be D..

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Lilly can fly her plane 200 miles against the wind in the same time it takes her to fly 300 miles with wind. If the wind blows a

expeople1 [14]

the ✈️ flies 150mph in still air

6 0

3 years ago

What is 3 ln 3 - ln 9 expressed as a single natural logarithm? ln 3 ln 6 ln 18 ln 27

mariarad [96]

Answer:

$\ln(3)$

Step-by-step explanation:

The given expresion is

$3 \ln(3) - \ln(9)$

Recall that:

$n \ln(a) = \ln( {a}^{n} )$

We apply this property to get:

$\ln( {3}^{3} ) - \ln(9)$

$\ln(27) - \ln(9)$

We apply the quotient rule to get

$\ln( \frac{27}{9} )$

$= \ln(3)$

The first choice us correct

8 0

3 years ago

Read 2 more answers

Question 1

Damm [24]

Answer: i think its B

Step-by-step explanation:

4 0

3 years ago

A bird has a mass of 26 g and perches in the middle of a stretched telephone line. (a) Show that the tension in the line can be

Semmy [17]

Answer:

a) is demonstrated below, b) T=1.462N, c) T=14.6N

Step-by-step explanation:

a) Refer to the attached diagram.

Since the bird is standing in the middle of the line and each half is a straight line, Ta=Tb, so we will call the tension T=Ta=Tb and Tay=Tby

By trigonometry Tay=Ta·Sinθ

Since the system is in equilibrium W=Tay+Tby then:

W=2·Tay=2·Ta·Sinθ=2·T·Sinθ

Since W=mg, being m the mass of the bird and g, gravity:

$mg=2TSin\theta$

Isolating T, we demonstrate that

$T=\frac{mg}{2Sin\theta}$

b) Replacing θ=5º, m=0.026kg and g=9.8m/s² in the last equation, we can get the tension in Newtons:

$T=\frac{0.026*9.8}{2Sin5}=1.462N$

c) With θ=0.5º

$T=\frac{0.026*9.8}{2Sin0.5}=14.6N$

7 0

3 years ago

Adding/Subtracting rational expressions

Leona [35]

7]
6/(x-1)-5x/4
subtracting the above we put the fraction under the same denominator:
6/(x-1)-5x/4
multiplying the denominators we get:
4(x-1)
thus subtracting we get:
6/(x-1)-5x/4
=(4*6-5x(x-1))/[4(x-1)]
=[24-5x^2+5x]/(4x-4)
Answer:
(-5x^2+5x+24)/(4x-4)

9]
3/(x+7)+4/(x-8)
the common denominator is:
(x+7)*(x-8)=(x+7)(x-8)
thus adding the fractions we put them under the same denominator as follows:
[3(x-8)+4(x+7)]/[(x+7)(x-8)]
=[3x-24+4x+28]/[(x+7)(x-8)]
=(7x+4)/[(x+7)(x-8)]

5 0

3 years ago