3 years ago

I need 2 more marks plz

Mathematics

1 answer:

Licemer1 [7]3 years ago

5 0

Answer:

Your answer is correct

Step-by-step explanation:

You can do this easier by doing

12.70 - (7 × 1.3) = 3.6

3.6 ÷ 2

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Answer:

2/9

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3 years ago

15 POINTS!! I NEED TO KNOW THE ANSWER WITHIN 2 HOURS!!! PLEASE HELP!!

iogann1982 [59]

<h3>Answer: x*a^2 or a^2*x</h3>

======================================

Work Shown:

a^(b+2) = a^b*a^2 ... break up the exponent

a^(b+2) = x*a^2 ... replace a^b with x

We don't know the value of 'a' nor the value of x, so we cannot evaluate further. This is the same as a^2*x because order of multiplication does not matter. For example, 2*3 = 6 and 3*2 = 6, so 2*3 = 3*2.

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3 years ago

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X = y^2 - 1

ohaa [14]

Answer: The correct option is (B) $2y^2-y-6=0.$

Step-by-step explanation: We are given the following system of equations :

$x=y^2-1~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\2x-y=4~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)$

We are to find the equation that could be the result of using substitution to solve the above system.

Substituting the value of x from equation (i) in equation (ii), we get

$2x-y=4\\\\\Rightarrow 2(y^2-1)-y=4\\\\\Rightarrow 2y^2-2-y=4\\\\\Rightarrow 2y^2-y-2-4=0\\\\\Rightarrow 2y^2-y-6=0.$

Thus, the required equation is $2y^2-y-6=0.$

Option (B) is CORRECT.

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3 years ago

Someone please help

hram777 [196]

Answer:

What's the question?

Step-by-step explanation:

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3 years ago

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A paddle boat can move at a speed of 18 km/h in still water. The boat is paddled 16 km downstream in a river in the same time i

Vladimir79 [104]

I think the answer is 2km/h

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4 years ago

I need 2 more marks plz​

I need 2 more marks plz