Expand the brackets 5(2x + 3)

Mathematics

2 answers:

zimovet [89]3 years ago

5 0

Answer:

10x+15

Step-by-step explanation:

5 x 2x=10x

5x3=15

azamat3 years ago

5 0

Answer:

10x+15

Step-by-step explanation:

5 x 2x= 10x

5 x 3= 15

10x+15

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X-4y=-21 8y-x=45 Solve the system (X,y)=

meriva

Answer:

$\displaystyle (3, 6)$

Step-by-step explanation:

{x -4y = −21

{8y - x = 45

_________

$\displaystyle \frac{4y}{4} = \frac{24}{4} \\ \\$

$\displaystyle y = 6$ [Plug this back into both equations above to get the x-coordinate of 3]; $\displaystyle 3 = x$

I am joyous to assist you anytime.

6 0

3 years ago

Hhh I’m very bad at math

barxatty [35]

Answer:

See below;

Step-by-step explanation:

21 . Consider an exponential function;

$Exponential Function in Form - y = a * b^x, where, a - start value, b - growth factor, x - time,\\\\Now y = f ( x ), in Other Words,\\p ( t ) = 300 * ( 0.5 )^t - Given,\\\\Through Substitution - f ( x ) = p ( t ), a = 300, b = 0.5, x = t,\\\\Conclusion ; 300 - ( start value ) - Starting Amount of Milligrams of Compound,\\0.5 - Milligrams Compound Decreases by$