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3 years ago

5

Bonjour,est ce que vous pouvez me faire cette exo svp

1 answer:

saveliy_v [14]3 years ago

7 0

Salut. BC²=AC²-AB² , BC=√((10)²-(8)²) , BC=√(100-64) , BC=√36 , BC=6cm. J'espere t,avoir aidé

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Sorry this isn't in middle school but please help?

solniwko [45]

#13 is 50 and #15 is 670

7 0

3 years ago

Read 2 more answers

How many solutions does the system<br> Y=-2x+2<br> Y=x2-2x+4

timofeeve [1]

Answer:

Your expression have just one solution because a lineal equation can have only one solution, but for example, a cuadratic equation can have 2 solutions or one repeated solution

brainliest please :)

8 0

4 years ago

Karina rode her bike up a mountain trail at an average of 4 mph. Then she rode it back down the trail at an average of 20 mph. T

earnstyle [38]

Answer:

36 miles.

Step-by-step explanation:

We have been given that Karina rode her bike up a mountain trail at an average of 4 mph. Then she rode it back down the trail at an average of 20 mph. The entire trip took 3 hours.

$\text{Distance}=\text{Speed}\times \text{Time}$

Substitute the given values:

$\text{Distance}=(\frac{4\text{ miles}}{\text{Hour}}+\frac{20\text{ miles}}{\text{Hour}})\times 3\text{ Hours}$

$\text{Distance}=(\frac{24\text{ miles}}{\text{Hour}})\times 3\text{ Hours}$

$\text{Distance}=24\text{ miles}\times 3$

$\text{Distance}=72\text{ miles}$

The total distance is 72 miles, so the distance going up would be half of 72.

$\frac{72}{2}=36$

Therefore, Karina went 36 miles up the mountain.

4 0

3 years ago

The sum of 10 consecutive integersstarting with 11, equals the sum of 5 consecutive integers, starting with

kaheart [24]

Answer: $\large\boxed{29}$

Step-by-step explanation:

The sum of 10 consecutive integersstarting with 11

= 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 155

Lets try 29:

29 + 30 + 31 + 32 + 33 = 155

Therefore our answer is:

$\large\boxed{29}$

3 0

2 years ago

The eight term of a geometric progression is given by Sn= -[-3(sin^2x + cos^2x)^n + In e. Find the first term and common ratio.

igor_vitrenko [27]

Answer:

Step-by-step explanation:

Sn= -[-3(sin^2x + cos^2x)^n + In e.

sin^2x + cos^2x = 1 and ln e = 1, so

Sn = -(-3)^n + 1

When n = 8

this = -(-3)^8 + 1

7 0

3 years ago