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3 years ago

Can someone please help

Mathematics

1 answer:

Andrews [41]3 years ago

3 0

Answer:

5 $\sqrt{6}$

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

Given

$\sqrt{150}$

= $\sqrt{25(6)}$

= $\sqrt{25}$ × $\sqrt{6}$

= 5 $\sqrt{6}$

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In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria, gives the area of a triangle by

uysha [10]

Answer:

C) $6.495\: ft^2$

Step-by-step explanation:

a = 7 ft, b = 3 ft, c = 5 ft (Given)

Therefore, a + b + c = 7 + 3 + 5 = 15 ft

Let's calculate semi Perimeter of the triangle which is given by s

$s =\frac{a+b+c}{2}=\frac{15}{2} = 7.5 \: ft$

Now, by Heron's formula, area of triangle ABC is given as:

$A(\triangle ABC) =\sqrt{s(s-a) (s-b)(s-c)}$

$\therefore A(\triangle ABC) =\sqrt{7.5(7.5-7) (7.5-3)(7.5-5)}$

$\therefore A(\triangle ABC) =\sqrt{7.5(0.5) (4.5)(2.5)}$

$\therefore A(\triangle ABC) =\sqrt{42.1875}$

$\therefore A(\triangle ABC) =6.49519053$

$\therefore A(\triangle ABC) =6.495\: ft^2$

8 0

3 years ago

Y=3x+2 is the equation of a straight line graph. Where does it cross the y-axis?

tamaranim1 [39]

The line crosses the y-axis at point (0,2). You know this because the slope intercept form is y=mx+b. y is any point on the y-axis. m is the slope of the line. x is and point on the x-axis. Finally, b is the y-intercept or where the line crosses the y-axis. As a result, your equation has a 2 for b. So, your answer would be: the line crosses the y-axis at point (0,2). 2 being where the line crosses the y-axis.

8 0

3 years ago

Find the measure of AB? using law of sines.

choli [55]

The Law of Sines states that
$\frac{ac}{ \sin(b) } = \frac{ab}{ \sin(c) }$
Therefore,
$\frac{15}{ \sin(44) } = \frac{ab}{ \sin(53) }$
Multiply both sides by sin(53):
$ab = \frac{ \sin(53) \times 15 }{ \sin(44) }$
AB = 17.25
The answer is D) 17

3 0

3 years ago

I need help with adding complex numbers

Usimov [2.4K]

For example:

Find: (3-i)+(2+3i) by graphing

Step 1: Graph 3-i and 2+3i on the complex plane. Connect each of these numbers to the origin with a line segment.

4 0

3 years ago

Together, Rhonda and Margo saved $478.50. If Rhonda saved $225 of that total, how much did Margo save? Select the addition equat

Sav [38]

Answer:

$253.5

Step-by-step explanation:

Total amount saved = Amount Rhonda saved + Amount Margo saved

= $478.50 − $225

Amount Margo saved = $253.5

3 0

3 years ago