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3 years ago

Which expression is equivalent to 6x2 – 19x – 55?

Mathematics

2 answers:

goblinko [34]3 years ago

7 0

So the right answer is of option D.

Look at the attached picture

Hope it will help you

Good luck on your assignment

belka [17]3 years ago

6 0

Answer:

(6x + 11)(x – 5)

Step-by-step explanation:

It's D on edg

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I got 2 questions.

alexandr402 [8]

Answer:

1. In triangle ABC,

AC = a = 10, BC =b= 7 and ∠ C = 90°

By cosine law,

$AB^2 = 7^2 + 10^2 - 2\times 7\times 10 cos 90^{\circ}$

$AB^2 = 49 + 100 - 0$

$AB^2 = 149$

$AB= \sqrt{149}$

Now, by the law of sine,

$\frac{sin B}{10} = \frac{sin90^{\circ}}{\sqrt{149} }$

$sin B = \frac{10}{\sqrt{149} }$

$\angle B = 55.0079798014\approx 55.008^{\circ}$

2. In triangle ABC,

∠B = 30°, AB=c=10 and ∠C = 90°

∠A = 180°-(30+90)°=60°

$\frac{AC}{10}=sin30^{\circ}$

⇒ $AC = \frac{10}{2} = 5$

By Pythagoras,

$CB^2 = AB^2 - AC^2=10^2 - 5^2 = 100 - 25 = 75$

⇒ $CB = \sqrt{75} =8.66025403784\approx 8.66$

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4 years ago

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Rudik [331]

He should change the coefficient 5

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3 years ago

Factorise fully 9x^2-9

MrMuchimi

9(x^2-1) or 9(x-1)(x+1)

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3 years ago

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You need to buy apples that costs $1.40 per pound. the farmer sells her apples in bags, and your bag is 2.5 pounds. How much did

lana [24]

Answer:

$3.50

Step-by-step explanation:

Let's split 2.5 into 2 separate parts, 2 and .5. To find how much 2 pounds of apples cost, we have to multiply $1.40 by 2. 1.40x2= 2.80. Now we have to figure out how much .5 pounds. To do this, we have to divide 1.40 by 2. We get .7. 2.80+ .7= $3.50 [or 3.5]

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3 years ago

If I was asked to think of a number and multiply it by 2, I could

finlep [7]

Answer:

4(2x-3)

Step-by-step explanation:

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3 years ago

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