3 years ago

Subtract – 2.2 + 3x – 9 from 8x2 + 10x – 10.

Mathematics

1 answer:

Ksju [112]3 years ago

6 0

Answer:

=3x−11

2(4x2+5x−5)

Step-by-step explanation:

both subtracted: −8x2−7x−1

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The speed of boat in still water is 15km/hr if needs 4 more his to travel 63 km against the current of a river than it needs to

hram777 [196]

Answer:

$\frac{63}{15 - c} - \frac{63}{15 + c} = 4$

Step-by-step explanation:

The systems of equations are

Let us assume the rate of the current be c

Now actual speed against the current is (15 - c)

And, the actual speed with the current is (15 + c)

Here we applied the time formula i.e. distance by speed

Also the upstream time - downstream time = 4

Now the equations are

$\frac{63}{15 - c} - \frac{63}{15 + c} = 4$

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2 years ago

The weight W of an aluminum flatboat varies directly with the length L of the boat. If a 6-foot boat weighs 102 pounds, then w

AnnZ [28]

Answer:

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Step-by-step explanation:

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3 years ago

Which expression is equivalent to (9x10z2)(x5y3)

MAVERICK [17]

Answer:

9x^15y^3z^2 is your answer

Step-by-step explanation:

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3 years ago

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n200080 [17]

Answer:

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2 years ago

If the value of b is 7 , then what is the value of the expression -3b2 + 25 = ?

Katarina [22]

Hello there!

Evaluate
-3b² + 25
For b = 7
-3(7)² + 25
-3(49) + 25
-147 + 25
= -122

I hope that helps!

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3 years ago