3 years ago

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Mathematics

2 answers:

marshall27 [118]3 years ago

7 0

Answer:

Step-by-step explanation:

I checked it and it’s right I hope this helps!!

Stolb23 [73]3 years ago

5 0

The answer is C
Hope this helps

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In a school gym, the ratio of the number of boys to girls was 4:3. After 160 boys left the gym, the ratio become 4:5. How many g

Alenkasestr [34]

Girls never change number

make same
4:3 times 5 is 20:15
4:5 times 3=12:15

boys:girls
from 20:15 to 12:15
boys dropped 160

20-12=8
160=8 units
divide both sides by 8
20=1unit

girls=15 units
20*15=300

300 girls

8 0

3 years ago

Rearrange the equation so U is the independent variable. 4u+8w=−3u+2w

Basile [38]

Answer:

$u=-\frac{6}{7} w$

Step-by-step explanation:

$4u+8w=-3u+2w$

Add $3u$ and $-8w$ on both sides.

$4u+3u=2w-8w$

Add or subtract like terms.

$7u=-6w$

Divide $7$ on both sides.

$7u/7=-6w/7$

$u=-\frac{6}{7} w$

$u$ is the independent variable now.

8 0

3 years ago

Read 2 more answers

If cos A = 3 over 11, then which of the following is correct?

ziro4ka [17]

Answer: The answer is (a) sec A = 11 over 3.

Step-by-step explanation: Given that Cosine of an angle 'A' is 3 over 11,

i.e.,

$\cos A=\dfrac{3}{11}.$

And we need to find which one of the given four options is correct.

We have the following relations between cosine, secant and cosecant of an angle from trigonometry.

$\sec A=\dfrac{1}{\cos A}~~\textup{and}~~\csc A=\dfrac{1}{\sqrt{1-\cos^2 A}}.$

Therefore,

$\sec A=\dfrac{11}{3}$

and

$\csc A=\dfrac{1}{\sqrt{1-\frac{9}{121}}}=\dfrac{1}{\sqrt{\frac{112}{121}}}=\dfrac{11}{4\sqrt 7}.$

Thus, the correct option is (a) sec A = 11 over 3.

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3 years ago

Sandra, who is paid time-and-a-half for hours worked in excess of 40 hours, had gross weekly wages of $ 608 or 56 hours worke

vodomira [7]

Time-and-a-half doesn't make enough sense to answer the question. If you fix it, or comment below the correction I will gladly help.

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3 years ago

Find the difference. Write your answer in the simplest form. 7/10 -1/4

Aleksandr-060686 [28]

Answer:

$\frac{9}{20}$

Step-by-step explanation:

6 0

2 years ago

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