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2 years ago

Help please! I don't understand.

Mathematics

1 answer:

Serhud [2]2 years ago

4 0

Answer:

Question 13: is Side-Side-Angel

Question 14: laws sines.

Question 15: is 1 (which b.)

there my brother tried his best, have a great day TwT

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What is 42.5% as a fraction in simplest form?

Oksana_A [137]

I think the answer is 17/4

3 0

3 years ago

What is 2√20 - 4√45 + 7√12 in simplest radical form? Show your work!

posledela

Answer:

$14\sqrt{3}-8\sqrt{5}$

Step-by-step explanation:

we have

$2\sqrt{20}-4\sqrt{45}+7\sqrt{12}$

we know that

$2\sqrt{20}=2\sqrt{2^{2}5} =2(2)\sqrt{5}=4\sqrt{5}$

$4\sqrt{45}=4\sqrt{3^{2}5} =4(3)\sqrt{5}=12\sqrt{5}$

$7\sqrt{12}=7\sqrt{2^{2}3} =7(2)\sqrt{3}=14\sqrt{3}$

substitute the values in the expression above

$4\sqrt{5}-12\sqrt{5}+14\sqrt{3}$

Combine like terms

$14\sqrt{3}-8\sqrt{5}$

8 0

2 years ago

Rectangle A has side lengths of 6\text{ cm}6 cm6, start text, space, c, m, end text and 3.5\text{ cm}3.5 cm3, point, 5, start te

sergiy2304 [10]

The side lengths of rectangle is 3 cm and 1.75 cm and 5.25 cm and 9 cm.

According to the statement

we have given that Rectangle A has side lengths of 6 cm and 3.5 cm

And The side lengths of rectangle B are proportional to the side lengths of rectangle A.

And we have to Find that the What could be the side lengths of rectangle B?

A 3 cm and 1.75 cm

B 5 cm and 2.5 cm

C 7 cm and 7 cm

D 12 cm and 5 cm

E 5.25 cm and 9 cm

Here we see that the side B are proportional to side length A of rectangle.

So,

Let say sides of rectangle B are a and b corresponding to sides 6 and 3.5 cm

=> a/6 = b/3.5

=> a/b = 6/3.5

=> a/b = 12/7

A 3 cm and 1.75 cm

3/1.75 = 12/7

Hence this is proportional

B 5 cm and 2.5 cm

5/2.5 = 2 ≠ 12/7

Not Proportional

C 7 cm and 7 cm

7/7 = 1 ≠ 12/7

Not Proportional

D 12 cm and 5 cm

12/5 ≠ 12/7

Not Proportional

E 5.25 cm and 9 cm

9/5.25 = 36/21 = 12/7

Hence this is proportional

So, 3 cm and 1.75 cm and 5.25 cm and 9 cm could be the side lengths of rectangle B.

Learn more about Rectangles here brainly.com/question/18019422

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3 0

2 years ago

I don't know why I can't think (maybe because its late) but can someone answer this along with a clear explanation? Thanks

MrMuchimi

$A=(0,1); \ \ \ B=(1,0)$

y = ax+b

$\pmb{1^{o}} \\ \\ \begin{cases} 1 = 0*a + b \\ 0 = 1*a + b \end{cases} \\ \\ \begin{cases} b = 1 \\ a+b = 0\end{cases} \\ \\ \begin{cases} b = 1 \\ a+1 = 0 \end{cases} \\ \\ \begin{cases} b = 1 \\ a = -1 \end{cases} \\ \\ \\ y = -x +1 \\ \\ y+x = 1 \\ \\ \boxed{4y+4x = 4}$

$\pmb{2^{o}} \\ \\ If \ A=(x_{1}, y_{1}); \ \ \ B = (x_{2},y_{2}) \\ \\ (x_{2} - x_{1}) (y - y_{1})=(y_{2}-y_{1})(x -x_{1}) \\ \\ (1 - 0)(y - 1)=(0 - 1)(x - 0) \\ \\ y - 1 = -x \\ \\ y+x = 1 \\ \\ \boxed{4y+4x = 4}$

5 0

3 years ago

A bee flies at 15 feet per second directly to a flowerbed from its hive. the bee stays at the flowerbed for 10 minutes, and the

spayn [35]

The equation can that can be used to find the distance of the flowerbed from the hive is d/15 + d/9 = 300

The flower bed is 1687.5ft away from the hive

<h3>How can the work mathematical expression be calculated?</h3>

We can denote the distance of flower bed from hive as d

The time that the the bee stays at the flower bed would be =10

The away for the bee from the hive=15 mins

Then the Time that the bed will use to move to the flower bed and back to the hive can be calculated as:

15 -10=5 minutes

we can convert to seconds as

=(5*60)=300 seconds

To calculate the time we can use the equation:

Distance/speed

Time of fright=300seconds

Time for flying from hive to flowerbed= d/15ft/s

Time for flying from flower bed to Hive= d/9ft/s

The equation can that can be used to find the distance of the flowerbed from the hive is d/15 + d/9 = 300

(9d+15d)/135 =300

24d/135 =300

24d =40500

d=1687.5ft

Learn more about work mathematical expression at:

brainly.com/question/13195377

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5 0

2 years ago

Help please! I don't understand.​

Help please! I don't understand.