3 years ago

Please help me........

Mathematics

1 answer:

scZoUnD [109]3 years ago

7 0

Answer:

a)5.8meters

b)15feet

c)She is right as 16 feet is equivalent to 4.8768m which is less than 5m

d)3.6576m

Step-by-step explanation:

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If sin^-1 (x+3) = -pi/6 , x = ?

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First recall that $\sin^{-1}x$ is defined only for $-1\le x\le1$ , which means $\sin^{-1}(x+3)$ requires that $2\le x+3\le4$ .

Over this domain, $\sin^{-1}(x+3)$ will be invertible, and so taking the sine of both sides, we have

$\sin^{-1}(x+3)=-\dfrac\pi6\implies\sin\left(\sin^{-1}(x+3)\right)=\sin\left(-\dfrac\pi6\right)$
$x+3=-\sin\dfrac\pi6$
$x+3=-\dfrac12$
$x=-\dfrac72$

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3 years ago

The area of a trapezoid with height z is 20 sq .cm. The length s of the parallel sides are (2z+3) and (6z-1) cm. Find the height

const2013 [10]

Answer:

Area of a trapezoid = ½(a + b)h, where a and b are the lengths of the parallel sides and h is its height.

From your information 20 = ½(2z + 3 + 6z – 1)z = ½(8z + 2)z = z(4z + 1)

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Step-by-step explanation:

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3 years ago

Rosie has £m in her pocket she is given £4 pocket money write an expression for how much money she has now

aksik [14]

Answer:

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Step-by-step explanation:

She currently has a variable "m" in her pocket which we don't know, BUT we know how much she is getting, which is 4.

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3 years ago

Factor this expression completely.<br> 6x^2- 13x - 28

wlad13 [49]

Answer:

this is the solution

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Need help!!!<br> On this it’s all math work!

Anton [14]

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Step-by-step explanation:

7-8 A squared + B squared =c Square

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145 244

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3 years ago

Please help me........​

Please help me........