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Anvisha [2.4K]
2 years ago
15

3(3a + 4b) + 4(2a - 5b) please answer quick​

Mathematics
1 answer:
Oliga [24]2 years ago
3 0

Step-by-step explanation:

3(3a+4b)+4(2a-5b)

=9a+12b+8a-20b

=17a-8b

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Use △XYZ, in which ∠X is a right angle and tanY=815.
Neporo4naja [7]

Answer:

8/17

Step-by-step explanation:

The correct and complete question is:

<em>Use △XYZ, in which ∠X is a right angle and tanY=8/15. What is the ratio for sinY?</em>

From definition:

tan(Y) = opposite/adjacent

From the graph and the question:

tan(Y) = XZ/XY = 8/15

Then:

XZ = 8 and XY = 15. Using pytaghorean theorem:

XZ² + XY² = YZ²

8² + 15² = YZ²

√289 = YZ

17 = YZ

From definition:

sin(Y) = opposite/hypotenuse

From the graph:

sin(Y) = XZ/YZ

sin(Y)= 8/17

8 0
2 years ago
9= 2/3 (x+12) plz help
avanturin [10]

Answer:  x=3/2  

Step-by-step explanation:

Multiply the parentheses by 2/3.  9=2/3x+8.

Multiply  both sides by 3 .  27=2x+24

Move the term. When moved to the left side it changes from positive to a negative.  -2x=24-27.

-2x=-3

Divide both sides by -2

x=3/2   (x=1 1/2, x=1.5)

5 0
3 years ago
At a water park, 27 out of 90 tickets sold were child tickets. what percentage of the tickets were child tickets?
Alik [6]
You do 27 divided by 90 27/90=0.3 and then move the decimal two places which would give you 30%
3 0
2 years ago
John is at a local bait shop; he wants to buy bait for his fishing trip. At the store, they are selling live bait for $12 a poun
Monica [59]

The system of inequalities is:  x\geq 3 and 12x+7y\leq 63

<em><u>Explanation</u></em>

Let x  be the amount of live bait and y  be the amount of natural bait.

As John would like to get at least 3 pounds of live bait, so the first inequality will be:  x\geq 3

Given that, price of live bait is $12 per pound and natural bait is $7 per pound. Also, he only has a budget of $63. That means, he can spend maximum $63

So, the cost for buying x pound of live bait =\$12x and the cost for buying y pound of natural bait =\$7y

Thus, the second inequality will be:  12x+7y\leq 63


5 0
2 years ago
What are all the values of x that make the quadratic A<br> equation below true?<br> x² – 16=0
Rudiy27
X^2 = 16
x = 4
x = -4
good luck :)
8 0
2 years ago
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