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3 years ago

Ny

Mathematics

1 answer:

faltersainse [42]3 years ago

4 0

I’m very sorry but I don’t understand

Step-by-step explanation:

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Simplify the expression(a4−6a2b2+ b4)−(−2a4+5a2b2+ 3b4) and hence, find its value for a = 2and b = −1.

ELEN [110]

Answer:

(a) $3a^4 - 11a^2b^2 -2b^4$

(b) $3a^4 - 11a^2b^2 -2b^4= 2$

Step-by-step explanation:

Given

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Solving (a): Simplify

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Open brackets

$a^4 - 6a^2b^2+ b^4 +2a^4-5a^2b^2- 3b^4$

Collect Like Terms

$a^4 +2a^4- 6a^2b^2-5a^2b^2+ b^4 - 3b^4$

Simplify Like Terms

$3a^4 - 11a^2b^2 -2b^4$

Solving (b): Simplify when a = 2 and b = -1

$3a^4 - 11a^2b^2 -2b^4$

$3*(2)^4 - 11*(2^2)*(-1)^2 -2*(-1)^4$

$3 * 16 - 11 * 4 * 1 - 2 * 1$

$48 - 44 - 2$

$= 2$

Hence:

$3a^4 - 11a^2b^2 -2b^4= 2$

4 0

3 years ago

What fraction is equal to a whole number ? <br> 3/6 , 10/4 , 7/8 , 8/.

d1i1m1o1n [39]

Answer:

I'm guessing the last (incomplete Option) because the rest are not whole numbers.

Step-by-step explanation:

7 0

3 years ago

What is the value of x in the equation 2(6x+4) - 6+ 2x - 3(4x+3)+1?

gizmo_the_mogwai [7]

Answer:

The question is incorrect. if you are going to solve an equation for x you need to set it equal to something.

8 0

3 years ago

NEED HELP WITH THIS QUESTION! Thank you

Kay [80]

Answer:

9 meters

Step-by-step explanation:

Area of a parallelogram is base * height.

A = b * h

65.7 = b * 7.3

b = 9 meters

4 0

4 years ago

Read 2 more answers

for a fundraiser, Hailey raises $27, plus 1.50 for each lap she swims. Tariana raises $18, plus $3 for each lap she swims what i

borishaifa [10]

Answer:

The number of laps for which two swimmers have raised the same amount of money is 6 .

Step-by-step explanation:

Given as :

The amount raised by Hailey = $27 + $1.50 × each lap she swim

The amount raised by Tariana = $18 + $3 × each lap she swim

Let The number of laps after which both swimmer raised same amount = n

Now, According to question

<u>For both swimmer to raised same amount</u>

I.e The amount raised by Hailey = The amount raised by Tariana

Or, $27 + $1.50 × each lap she swim = $18 + $3 × each lap she swim

Or, $27 + $1.50 × n = $18 + $3 × n

Or, $27 - $18 = $3 n - $1.50 n

Or, 9 = 1.5 n

∴ n = $\dfrac{9}{1.5}$

I.e n = 6

So, number of lap for same amount of both = n = 6

Hence The number of laps for which two swimmers have raised the same amount of money is 6 . Answer

5 0

3 years ago