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jekas [21]
3 years ago
5

Answer these 2 questions if ur smart?!?!?

Mathematics
2 answers:
Mariulka [41]3 years ago
8 0

1. (4x+5y)(2x-3y)+3xy= 4x*2x-4x*3y+5y*2x-5y*3y+3xy=8x^2-12xy+10xy-15y^2+3xy= 8x^2+xy-15y^2

2. (2x^2+3)(4x+5)-8x(x^2-2)=2x^2*4x+2x^2*5+3*4x+3*5-8x*x^2+8x*2=

=8x^3+10x^2+12x+15-8x^3+16x=

=10x^2+28x+15

Aleks [24]3 years ago
8 0

Answer:

1. 8x^2+xy-15y^2           2. 10x^2 + 28x + 15

Step-by-step explanation:

For Question 1:

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

= 8x^2 - 12xy + 10xy - 15y^2 + 3xy

=8x^2+xy-15y^2       (cannot simplify any further)

For Question 2:

(2x^2 + 3)(4x +5) - 8x(x^2 -2)

=8x^3 + 10x^2 + 12x + 15 - 8x^3 + 16x

=10x^2 + 28x + 15         (cannot simplify any further)

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The answer for this question is letter c
7 0
3 years ago
EASY PLEASE HELP HELP<br><br><br>Write the scale without units: 1 cm:1 km
Lera25 [3.4K]

Answer:

1:1

Step-by-step explanation:

thats how you write scale

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8 0
3 years ago
As a salesperson, you are paid $50 per week plus $3 per sale. This week you want your pay to be least $100. Write and inequality
schepotkina [342]

Answer:

50 + 3x ≥ 100

Step-by-step explanation:

You already know that you are getting $50 that week. Then, for every sale you make $3. Your goal is $100, but you wouldn't complain about making more. Therefore, the inequality sign used here should be the greater than or equal to sign (≥). Your equation should be what is written above, with your payment on the left and earning goal on the right of the inequality sign.

8 0
3 years ago
Kanye deposits 3850 at 8% annual simple interest for 1 year how much interest will he earn
aalyn [17]

Answer:

308

Step-by-step explanation:

We are given;

  • Money deposited (Principal) as 3850
  • Annual rate of interest as 8%
  • Period or time = 1 year

We are required to determine the interest accrued;

  • We are going to use the formula of calculating simple interest;
  • Simple interest = (P × R × T)/100

Where P is the principal, R is the rate while T is the time.

Therefore;

Simple interest = (3850 × 8 × 1) ÷ 100

                        = 308

Therefore, the money earned simple interest of 308 within 1 year

7 0
4 years ago
a leatherback turtle swims at a constant rate of 2.5 kilometers per hour, at its constant rate of speed how long will it take fo
LekaFEV [45]
Hello there!

So, if this turtle is only going 2.5 miles per hour. This would mean that (EACH) hour, this turtle only arrived 2.5 miles. So, we do,

\boxed{10.0 \left \{ {{2.5+2.5=5.0} \atop {2.5+2.5=5.0}} \right.}

We would have to count how many ("2.5's" they are above.)

We count only 4.

I would take this turtle 4 miles to swim 10 kilometers.
5 0
4 years ago
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