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3 years ago

PLEASE HELP 30 POINTS!!!!!

Mathematics

1 answer:

trasher [3.6K]3 years ago

6 0

Answer:

Reduction. The coordinates that are prime is the smaller, inside triangle. Since the triangle is shrinking and becoming smaller, its a reduction.

Step-by-step explanation:

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a motorboat travels 371 kilometers in 7 hours going upstream. it travels 525 kilometers going downstream in the same amount of t

e-lub [12.9K]

Answer:

Speed of boat in still water = 64 km/hr

Speed of the current = 11 km/hr

Step-by-step explanation:

Let the speed of motorboat in still water = x km/hr

Let the speed of current = y km/hr

Motorboat travels 371 km in 7 hours going upstream.

Speed of motorboat while going upstream = speed of motorboat in still water - speed of current = (x-y)

=> $x-y = \frac{371}{7}$

=> $x-y = 53$ ------------------------------(1)

Motorboat travels 525 km in 7 hours going downstream.

Speed of motorboat while going downstream = speed of motorboat in still water + speed of current = (x+y)

=> $x+y = \frac{525}{7}$

=> $x+y = 75$ -----------------------------(2)

Solving for x and y from (1) and (2):

Adding (1) and (2):

2x = 128

=> x = 64

Substituting the value of x in (1), y = 11

6 0

3 years ago

WORTH BRAINLIEST!<br><br> of you help me

vazorg [7]

Answer:

8. $\frac{55}{-11} \\$

9. -38 ÷ 19

10. -4 ÷ -2

11. 190° im pretty sure

Step-by-step explanation:

4 0

3 years ago

Find all values of $x$ such that $\dfrac{x}{x+4} = -\dfrac{9}{x+3}$. If you find more than one value, then list your solutions i

mixer [17]

We start with

$\dfrac{x}{x+4} = -\dfrac{9}{x+3}$

Assuming that $x \notin \{-4,\ -3\}$ we can cross multiply the equation:

$x(x+3) = -9(x+4) \iff x^2+3x=-9x-36 \iff x^2+12x+36=0$

You can recognize the perfect square pattern in the quadratic equation:

$x^2+12x+36 = (x)^2 + 2\cdot x \cdot 6 + (6)^2 = (x+6)^2$

So, we have

$x^2+12x+36=0 \iff (x+6)^2 = 0 \iff x+6=0 \iff x=-6$

Which is the only solution, with multiplicity 2.

8 0

4 years ago

Read 2 more answers

Eva bought 5 pairs of identical socks and a $6.50 hairbrush. The total cost for the items was less than $29. Which of these ineq

il63 [147K]

It would be A LOL EASY

7 0

4 years ago

Read 2 more answers

Jamie kept track of the total hours and minutes she worked this week at the local health food store.

ddd [48]

1 hour = 60 minutes.

Convert the minutes to decimals by diving by 60

30/60 = 0.5

2 hours and 30 minutes = 2.5 hours

45/60 = 0.75

5 hours 45 minutes = 5.75 hours

15/50 = 0.25

3 hours 15 minutes = 3.25 hours

Ow add all the hours:

2.5 + 5 + 5.75 + 3.25 = 16.5 hours

Answer: B. 16.50

7 0

3 years ago