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Snowcat [4.5K]
3 years ago
10

Simplify (4x+5y) (2x-3y) + 3xy

Mathematics
1 answer:
zalisa [80]3 years ago
4 0

Answer:

the answer is 8x^2+xy-15y^2

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Martha has $20 to spend on a t-shirt. She has a coupon for 20% off. The t-shirt regularly sells for $22.50 plus 10% sales tax.
rodikova [14]

Answer:

1 and 3

Step-by-step explanation:

Step 1 is clearly elaborated.  Tax is impliedd on the discounted price.

In step 3, the steps of deductions are skipped.

Like 1 + 10% = 110% and 1 - 20% = 80%

Step 2 is simply wrong. Because the percentages are implied on different values.

5 0
3 years ago
A car drives at a speed of 34 2/3 mph. How many miles will the car travel in:<br> 40 min?
Ierofanga [76]

40 minutes is not a full hour so you need to convert this to hours

40 minutes / 60 minutes = 2/3 of an hour

So a car driving at the rate of 34 2/3 mph will go

34 2/3 * 2/3 = Miles in 40 minutes

40 * (4/9) = ?or

160/9 = ? or

17 7/9 Miles
7 0
3 years ago
Help please<br> 3^4 + 4 ⋅ 5 = ____. (Input whole numbers only.) (20 points)
Akimi4 [234]

Answer:

101

Step-by-step explanation:

3^4 = 81

4 x 5  20

81 +20 = 101

3 0
3 years ago
Read 2 more answers
Help me find x and y
Leona [35]

Answer:

u can ask if u didn't understand !

6 0
3 years ago
Someone please help and explain it would really help
Vaselesa [24]

So when you're solving for x here and distribute 8 on the right side, it would look like this:

8x+47=8(x+5)\\ \\ 8x+47=8x+40

Now in order to solve for x, we know we have to get all the x's on one side of the equal sign. Let's get all our x's to the left side. Since the right side has a positive 8x, you need to subtract 8x on the right. But whatever you do to one side you must do to the other. So since we are subtracting 8x on the right, we need to do that on the left.

But we can't! Since both sides will cancel out to zero before x can be solved.

Therefore the answer is 0.

Hope that helps!

8 0
4 years ago
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