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3 years ago

Hiii pleasee help if u know it :)

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

8 0

Answer:

Step-by-step explanation:

shepuryov [24]3 years ago

6 0

Answer:

82 M

Step-by-step explanation:

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8 less than the product of 5 and-4

alina1380 [7]

So it says 8 less than, meaning 8 minus the product of 5 and -4, so literally it means subtract 8 from 5X-4
8-5*-4

4 0

3 years ago

Read 2 more answers

The product of 3x and (3x+1) is a t least 35

Leokris [45]

Product means the sum of two things i.e. the product of 1 and 2 is 3 <span>(1 + 2 = 3)

So the product of 3x and (3x+1) can be written as:
35 < 3x + 3x + 1
^ Greater than 35 i.e. at least 35
35 < 6x + 1
34 < 6x
34/6 < x
17/3 < x
5.67 (2dp) < x

</span>

6 0

4 years ago

See attached photo!! PLEASE ANSWER THIS ASAP!! THANKS IN ADVANCE! CORRECT ANSWER ONLY!!

Kruka [31]

Answer:

10. Statement: Point P lies on line C'D'. Reason: The coordinates of P satisfy the equation of line C'D'.

Step-by-step explanation:

The equation for line C'D' in statement 8 appears to be in error. It should be ...

$y=\dfrac{-s}{2t-r}x+\dfrac{2st}{2t-r}$

The coordinates of point P given in statement 9 are in error (they cannot be negative). They should be ...

P = (2/3(r+t), 2/3s) . . . . . without the minus signs

This point will satisfy the equation of line C'D'. Here is the algebra. (Notice we have multiplied each term on the right of the above equation by (-1/-1).

$y=\dfrac{s}{r-2t}x-\dfrac{2st}{r-2t}\\\\\dfrac{2}{3}s=\dfrac{s}{r-2t}\cdot\dfrac{2}{3}(r+t)-\dfrac{2st}{r-2t}\qquad\text{substitute P for (x, y)}\\\\s(r-2t)=s(r+t)-3st\qquad\text{multiply by $\frac{3}{2}$(r-2t)}\\\\sr-2st=sr-2st\qquad\text{P satisfies the equation for line C'D'}$

So, step 10 should say, in effect, P lies on C'D'.

_____

<em>Comment on the proof</em>

IMO it is unfortunate that this proof has so many mistakes. Properly done, it is a nice demonstration that the medians are concurrent. It also demonstrates that the location of the centroid is 1/3 of the distance along the median toward the vertex.

6 0

4 years ago

Read 2 more answers

2 1/2 cups of flour makes 20 cupcakes

inessss [21]

6 cups of flour! Hoped this helps!!

4 0

3 years ago

Read 2 more answers

A salmon is swimming in a river that is flowing downstream at a speed of 2 miles per hour. The slamon can swim 12 miles upstream

Olegator [25]

Answer:

The speed of the salmon in still water is 6 mi/h

Step-by-step explanation:

When an object moves with a speed So (So measured in still water) in a river with speed Sr:

If the object moves along the current (downstream), then the actual speed of the object will be:

S = So + Sr

If the object moves upstream, then the velocity will be:

S = So - Sr

In this case we know the speed of the river downstream is 2 mi/h

Sr = 2mi/h

And we know that the salmon can swim 12 miles upstream in the same time (T) that it can swim 24 miles downstream.

Here you need to remember the relation:

Distance = Time*Speed.

Then we know that:

24 mi = (So + 2mi/h)*T

12 mi = (So - 2mi/h)*T

Now we can take the quotient of these two equations to get:

(24mi/12mi) = ( (So + 2mi/h)*T)/((So - 2mi/h)*T)

2 = (So + 2mi/h)/(So - 2mi/h)

Let's multiply both sides by the denominator of the right part:

2*(So - 2mi/h) = (So + 2mi/h)

2*So - 4mi/h = So + 2mi/h

Now we need to isolate So, the speed of the salmon in still water:

2*So - So = 2mi/h + 4mi/h

So = 6mi/h

The speed of the salmon in still water is 6 mi/h

7 0

3 years ago

Hiii pleasee help if u know it :)​

Hiii pleasee help if u know it :)