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3 years ago

Factorise the followingx^2+2x-8

Mathematics

1 answer:

ioda3 years ago

7 0

Answer:

${x}^{2} + 2x - 8 \\ {x}^{2} + 4x - 2x - 8 \\ x(x + 4) - 2(x + 4) \\ = (x + 4)(x - 2)$

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Solve AABC. Round your answers to the nearest hundredth, if necessary

Aloiza [94]

Answer:

$C=25^{\circ},\\a\approx 10.72,\\b\approx 11.83$

Step-by-step explanation:

The sum of the interior angles of a triangle is 180 degrees. Thus, angle C must be $180-90-65=25^{\circ}$ .

In any triangle, the Law of Sines is given by $\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}$ .

Therefore, we have:

$\frac{\sin 90^{\circ}}{b}=\frac{\sin 25^{\circ}}{5},\\\\b=\frac{5\sin90^{\circ}}{\sin 25^{\circ}}=11.8310079158\approx \boxed{11.83}$

$\frac{a}{\sin 65^{\circ}}=\frac{5}{\sin25^{\circ}},\\a=\frac{5\sin 65^{\circ}}{\sin25^{\circ}}=10.7225346025\approx \boxed{10.72}$

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2 years ago

Multiply and simplify: 3a(4a2 – 5a + 12)

DochEvi [55]

3a(4a²-5a+12)

12a³-15a²+36a

~Hope this helped!~

3 0

2 years ago

What’s the answer to 2(4+9w)

maks197457 [2]

Answer:

8+18W

Step-by-step explanation:

distribute the 2 into the parentheses. 2×4 is 8 and 2×8 is 18.

3 0

3 years ago

The sentence "the length of a rectangle is 6 feet more than the width" can be translated as / = 6 + w.

matrenka [14]

Answer:

true

Step-by-step explanation:

if the width is w and the length is l then 6 more than the width is w+6 and that is equal to the length so l = w+6

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3 years ago

What is 1/2 + 4/3 + 3/2 + 4/3 + 10/6 = ??<br> (they are fractions)

Jet001 [13]

6 and 1/3 or 19/3 or if you need the decimal 6.3 repeating

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2 years ago

Read 2 more answers

Factorise the followingx^2+2x-8​

Factorise the followingx^2+2x-8