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3 years ago

Can someone please help me with ALL of these questions

Mathematics

1 answer:

lora16 [44]3 years ago

5 0

37. B: Negative inverse, the product of the gradients is -1

38. C: decreases

39. B: the sum of all divided by 9

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A football team gains 3 yards on the first play ,loses 6 yards on the second play,loses 4 yards on the third play , and gains 5

galben [10]

Net yardage=3-6-4+5=-2

So the team lost 2 yards in four plays...

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3 years ago

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What is the interest on Rr 20,000 if the interest rate is 15%?

Basile [38]

Answer: Rr.3,000

Step-by-step explanation:

The interest is the amount that accrues on a principal that was invested or a cost that was incurred.

It is based on a certain interest rate which in this case is 15%.

The principal is Rr. 20,000.

Interest = Principal * Interest rate

= 20,000 * 15%

= Rr.3,000

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3 years ago

What is the rate of change (86, 124) (64, 113)

harkovskaia [24]

Hey there!

The rate of change for these two points would be m = 1/2. Subtract the two y points from each other and then the two x points from each other. Then you divide them. Or get a simplified fraction.

Hope this helped!

8 0

3 years ago

If ab = 8 and a^2+b^2=16, then what is the value of (a+b)^2?

aksik [14]

$ab = 8$ & $a^{2} + b^{2} = 16$ so , $( a+b )^{2} = 32$ .

<u>Step-by-step explanation:</u>

Here we have , ab= 8 & a^2+b^2=16 i.e. $ab = 8$ and $a^{2} + b^{2} = 16$ .

We need to find value of (a+b)^2 i.e. $(a+b)^{2}$ :

It's and identity and we know that $( a+b )^{2} = a^{2} +b^{2} +2ab$

⇒ $( a+b )^{2} = a^{2} +b^{2} +2ab$

⇒ $( a+b )^{2} = (a^{2} +b^{2}) +2(ab)$

⇒ $( a+b )^{2} = (16) +2(8)$

⇒ $( a+b )^{2} = (16) +(16)$

⇒ $( a+b )^{2} = 32$

∴ $ab = 8$ & $a^{2} + b^{2} = 16$ so , $( a+b )^{2} = 32$ .

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3 years ago

Brian had k dollars to begin with. He just spent 39 dollars. Using k, write an expression for the number of dollars he has left.

antiseptic1488 [7]

K-39 hope I understood the problem right but I hope this helped :)

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3 years ago

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