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3 years ago

What is -7a - 5a + 1 + 9

Mathematics

1 answer:

stealth61 [152]3 years ago

6 0

Answer:

2a+10 is your answer

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2 to 10 by __ to get the ratio 4 to 20

Phantasy [73]

Answer:

multiply by 2

Step-by-step explanation:

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3 years ago

Find the slope from the table:

Lena [83]

Answer: m=-5/3

Step-by-step explanation:

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3 years ago

If Tanø =a/b Find the value of sinø+cosø/sinø-cosø

inysia [295]

Answer:

$\frac{b+a}{b-a}$

Step-by-step explanation:

Tan θ = $\frac{perpendicular}{base}$ = $\frac{b}{a}$

So, Perpendicular = b, base = a

Finding hypotenuse by Pythagorean Theorem:

$c^2 = a^2+b^2$

=> So, hypotenuse = c

Sin θ = $\frac{perpendicular}{hypotenuse}= \frac{b}{c}$

Cos θ = $\frac{base}{hypotenuse}= \frac{a}{c}$

So, Now finding $\frac{sin\theta+cos\theta}{sin\theta-cos\theta}$

=> $\frac{b}{c} + \frac{a}{c}$ ÷ $\frac{b}{c} - \frac{a}{c}$

=> $\frac{b+a}{c}$ ÷ $\frac{b-a}{c}$

=> $\frac{b+a}{c} * \frac{c}{b-a}$

=> $\frac{b+a}{b-a}$

4 0

3 years ago

Anna is trying to figure out how much her 10-mile taxi ride is going to cost. It costs $5 to be picked up by the taxi, and each

Novosadov [1.4K]

Answer:

y=2x+5

because y is the final cost, x is the amount of miles times 2 since each mile costs $2, and an addition $5 for the taxi-pickup

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3 years ago

The two-way table shows the number of people ages 20 and 50 who belong to Group A or B.

BabaBlast [244]

If what you mean by the "percent of people 50 years old belong to group A" is the percentage of 50-year old people with respect to the total number of people belonging to group A, then the answer is

32/(19+32) * 100 = 63%

But, if what you mean is the percentage of 50-year old people in group A with respect to the total number of 50-year old people, then the answer will be

32/(32+24) * 100 = 57%

8 0

3 years ago