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2 years ago

Review the proof of tan (A-B) =

Mathematics

1 answer:

Yuri [45]2 years ago

7 0

Answer: The expression which must fill in each blank space to complete step 3 is; Choice B; Cos(A)Cos(B).

Which expression must fill in each blank space?

From the task content; It follows that the mathematical evaluation is in a bid to derive the Trigonometric identity for Tan (A-B).

From observation, it follows that the required expression is; cos(A)sin(B). This is because upon division of each term by the expression, the result is as in Step 4.

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Emily buys 14 balloons. 3 are red, 4 are white, and the rest are blue. What is the ratio of blue balloons to the total number of

8_murik_8 [283]

Answer:

3:4:7

Step-by-step explanation:

14-(3+4)

=14-7

red:white:blue

3:4:7

5 0

3 years ago

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Help me out please I'm not sure what goes where and I always get frustrated with these

Hunter-Best [27]

yes:x+7=18

no:2x+7=36

x+14=36

not enough info:(2×x)+(2×7)=36

2 (x+7)=72

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3 years ago

Pam spelled 68 of 100 words correctly on the pretest. How many words did she miss? If she learns 8 of those each day, how long w

Fofino [41]

Answer:

Pam missed 32 words in her pretest.

It will take 4 days for Pam to learn all missed words.

Step-by-step explanation:

Given:

Number of words spelled correctly = 68

Total number of words on the pretest = 100

We need to find the number of words she missed.

Solution:

now we can say that;

Number of words she missed can be calculated by subtracting Number of words spelled correctly from Total number of words on the pretest.

framing in equation form we get;

Number of words she missed = $100 -68 =32\ words$

Hence Pam missed 32 words in her pretest.

Now Given:

Number of words missed learned each day = 8

Total number of words missed = 32 words.

We need to find how long will take to learn them all.

now we can say that;

days required to learn missed words is equal to total number of words missed divided by Number of words missed learned each day.

framing in equation form we get;

Days required to learn missed words = $\frac{32}{8}=4\ days$

Hence It will take 4 days for Pam to learn all missed words.

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3 years ago

Numbers are formed using the digits 1, 2, 3, 4, 5, 6. If no digit may be repeated, how many two-digit

Trava [24]

I got 20.

I may have done it wrong so maybe wait until others have answered.

4 0

3 years ago

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Jane's car will go 420 miles on 17.5 gallons of gasoline in highway driving.

bulgar [2K]

Answer:

a) 101.125 gallons.

b) 3312 miles.

Step-by-step explanation:

You know that Jane's car will go 420 miles on 17.5 gallons of gasoline in highway driving, therefore:

a) You can calculate the number of gallons it will take to drive 2427 miles from her house to a friend's house as following:

$\frac{420miles}{17.5gallons}=\frac{2427miles}{x}\\x=101.125gallons$

b) You can calculate the distance the car can be driven on 138 gallons of gasoline as shown below:

$\frac{420miles}{17.5gallons}=\frac{y}{138gallons}\\y=3312miles$

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4 years ago