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3 years ago

Find what he did wrong and fix it. Need answer fast with all the steps included please. NEED HELP

Mathematics

1 answer:

Rudik [331]3 years ago

8 0

Simplify The numerator

$4 {a}^{2} - {b}^{2} = (2a + b)(2a - b)$

$\sqrt{ \frac{(2a + b)(2a - b)}{9a} }$

$\sqrt{9a} = \sqrt{9} \times \sqrt{a}$

$3 \times \sqrt{a}$

$\sqrt{ \frac{(2a + b)(2a - b)}{3 \sqrt{a} } }$

RATIONALIZE

$\frac{ \sqrt{a} \sqrt{(2a + b)(2a - b)} }{3 \sqrt{a } \times \sqrt{a} }$

$\sqrt{ \frac{a(2a + b)(2a - b)}{3a} }$ . This is the answer

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6. The vertices of ALMN are L(7,4), M(7,16), and

max2010maxim [7]

Answer:

(a) LM=12 units, LN=35 units, MN=37 units

(b)8 84 units

Step-by-step explanation:

(a)

Since points L and M have same x coordinates, it means they are in the same plane. Also, since the Y coordinates of L and N are same, they also lie in the same plane

Length $LM=\sqrt {(7-7)^{2}+(16-4)^{2}}=12 units$

Length $LN=\sqrt {(42-7)^{2}+(4-4)^{2}}=35 units$

Length $MN=\sqrt {(42-7)^{2}+(4-16)^{2}}=37 units$

Alternatively, since this is a right angle triangle, length MN is found using Pythagoras theorem where

$MN=\sqrt {(LN)^{2}+(LM)^{2}}=\sqrt {(12)^{2}+(35)^{2}}=37 units$

Therefore, the lengths LM=12 units, LN=35 units and MN=37 units

(b)

Perimeter is the distance all round the figure

P=LM+LN+MN=12 units+35 units+37 units=84 units

(c)

Area of a triangle is given by 0.5bh where b is base and h is height, in this case, b is LN=35 units and h=LM which is 12 units

Therefore, A=0.5*12*35= 210 square units

4 0

3 years ago

Kenya exchanges $200 for euros (€). Suppose the conversion rate is €1 = $1.321. How many euros should Kenya receive?

Anon25 [30]

€151.40 would be the outcome i believe

6 0

3 years ago

Read 2 more answers

Jesse went to the post

skelet666 [1.2K]

Answer:

9 wagon stamps and 1 sailboat stamp!

Step-by-step explanation:

7×4= 28

28+3=31

3 0

3 years ago

Two numbers have theses properties . both numbers are greater than 6 . their hcf = 6 . their lcm = 60. what are the two numbers

aleksandrvk [35]

Let the numbers be x and y.
x*y=HCF*LCM=6*60=360
thus
y=360/x
next we find the list of combinations of x and y and test if they satisfy the conditions above:
(6,60),(12,30),(18,20),(24,15)
out of the above, only (6,60) and (12,30) satisfy both conditions. Thus our answer is:
(6,60) or (12,30)

6 0

3 years ago

Find the total value of an investment of $1030 at 4% for 2 years to the nearest dollar.

mel-nik [20]

Answer:

1114$

Step-by-step explanation:

3 0

3 years ago