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solniwko [45]
2 years ago
14

PLEASE HELP!!!

Mathematics
1 answer:
Fed [463]2 years ago
8 0

Answer:

b -17

Step-by-step explanation:

−a^2 − 3b^3 + c^2 + 2b^3 − c^2 =

= -(3²) - 3(2³) + (-3)² + 2(2³) - (-3)²

= -9 - 3(8) + 9 + 2(8) - 9

= -9 - 24 + 9 + 16 - 9

= -17

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Danny walks at an average speed of 5 m/s foe 1 minute. Work out the distance that Danny has travelled in metres.
Dahasolnce [82]

Answer:

D = 300 m

Step-by-step explanation:

<u><em>Given :</em></u>

Speed = 5 m/s

Time = 1 min = 60 secs

<u><em>Required:</em></u>

Distance = ?

<u><em>Formula :</em></u>

Speed = Distance/Time

<u><em>Solution:</em></u>

Distance = Speed × Time

D = 5 × 60

D = 300 m

4 0
3 years ago
Read 2 more answers
4. Solve for w:<br> -33 = 6 - 3w
gavmur [86]

Answer:

13 =w

Step-by-step explanation:

-33 = 6 - 3w

Subtract 6 from each side

-33-6 = 6 - 3w-6

-39 = -3w

Divide each side by -3

-39/-3 = -3w/-3

13 =w

3 0
3 years ago
Read 2 more answers
Write the equation of the line that passes through the points (9, -8) and (-3,8).
trapecia [35]
It would be (6,7) so which is why the Pokémon entered the facility
6 0
3 years ago
Bill wanted to try out different water craft he went 62 mikes downstream in a motor boat and 27 mikes down stream on a jest ski
valina [46]

Answer:

The speed on motorboat is 20 mph

Step-by-step explanation:

here, we want to find the speed on the motorboat

if he has a speed of x mph on the motor boat, his speed on the ski will be (x + 10) mph

The total hours is 4 hours

Mathematically; speed = distance/time

Time on ski is 27/x+ 10

Time on motor boat is 62/x

The addition of both is 4

Thus;

27/(x + 10) + 62/x = 4

27(x) + 62(x + 10) = 4(x)(x + 10)

27x + 62x + 620 = 4(x^2 + 10x)

89x + 620 = 4x^2 + 40x

4x^2 -49x-620 = 0

using the quadratic formula;

{-b ± √(b^2-4ac)}/2a

where a = 4, b = -49 and c = -620

= 49 ± √(-49)^2-4(4)(-620)/8

So we have

49+ 111/8 or 49-111/8

Speed cannot be negative

(49 + 111)/8

= 20 mph

3 0
2 years ago
7. Use the quotient rule to simplify the following expression. Assume that x&gt;0.
NeTakaya
Quotient rule says we can divide 192 and 3 because they are both under the radical. This gives us the square root of 64.

We can also divide x^3 and x to get x^2.

The square root of 64x^2 is 8x
8 0
3 years ago
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