1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balandron [24]
3 years ago
13

Simplify the expression, then evaluate when x=5 and y=6. x(y+4)+3(2x+7y)

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
3 0

Answer:

Simplification

x(y+4)+3(2x+7y) = xy + 10x + 21y

= x(y + 10) + 21y

On evaluation when x=5 and y=6,

The expression is equal to 206

Step-by-step explanation:

Note that x and y are unknown variables.

On expansion,

x(y+4)+3(2x+7y)

= xXy + xX4 + 3X2x + 3X7y

= xy + 4x + 6x + 21y

= xy + 10x + 21y

On factorising,

xy + 10x + 21y = x(y + 10) + 21y

Evaluation when x=5 and y = 6

We substitute the given values of x and y into the simplified expression

xy + 10x + 21y

= 5X6 + 10X5 + 21X6

= 30 + 50 + 126

= 206

Therefore, on evaluation of the given expression, when x=5 and y=6, we get 206

You might be interested in
Please Help Me :((.
Sidana [21]

Answer:

4.2 h

Step-by-step explanation:

12 * (50%-15%) = 4.2 h

8 0
3 years ago
Plzzzzzzzzzzzzzaaaaaa
son4ous [18]

Answer:

C

Step-by-step explanation:

y^2+4y-32=0\\(y+8)(y-4)=0\\y=4,-8

Therefore, the answer is C. Hope this helps!

5 0
3 years ago
Somebody please help​
DaniilM [7]

Answer:

3/5x−3/7

Step-by-step explanation:

Simplify the expression.

3/5x−3/7

-hope it helps

6 0
2 years ago
Allison paid $297.50 for a new laptop. Last week, the price of the laptop<br> was $350.
Thepotemich [5.8K]

15%

350x0.15=52.5

350-52.5=297.5

4 0
3 years ago
Given the triangle below, what is m<br> A. 46.2<br> B. 41.40<br> C. 48.4<br> D. 38.6°
Brrunno [24]

Answer:

B 41.4

Step-by-step explanation:

complete Pythagoras for general triangles :

c² = a² + b² - 2ab×cos(C)

with "c" being the side opposite of the angle C.

=>

8² = 10² + 12² - 2×10×12×cos(C)

64 = 244 - 240×cos(C)

240×cos(C) = 244 - 64 = 180

cos(C) = 180/240 = 18/24 = 3/4 = 0.75

C = 41.40962211... ≈ 41.4

5 0
3 years ago
Other questions:
  • A company's profit (in millions of dollars) can be represented by x^2-6x+12, where x is the number of years since the company st
    11·1 answer
  • -5(x-2) - 2x + 6 help me answer this!
    11·1 answer
  • a lottery offers one $1000 prize one $500 and two $50 prizes. one thousand tickets are sold at $2.50. what is the expectived pro
    14·1 answer
  • Factor Xsquared +12x+27
    6·1 answer
  • You buy a car for $8,000 that depreciates at a rate of 11% a year. How much is the car worth after 5 years?
    5·1 answer
  • Find the 9th term of the geometric sequence 10, 40, 160, ...​
    15·1 answer
  • John throws a biased coin 120 times
    7·1 answer
  • Please help me..........<br><br>only 32,and 33​
    7·1 answer
  • Please help me with this question
    11·1 answer
  • If anyone can help, it’d be appreciated! I’m so confused
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!