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xenn [34]
2 years ago
7

Evaluate the expression when x=3 and y=5 2xy

Mathematics
2 answers:
bija089 [108]2 years ago
7 0

Answer:

30

Step-by-step explanation:

Substitute for x and y

2 x 3 x 5 = 6 x 5 = 30


I hope this helped and please mark mark me as brainliest!

pickupchik [31]2 years ago
6 0
The answer is 30 because 2(3)(5) equals 30
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Five workers dig a trench 5 yards long in 5 hours. How many workers are needed to dig a 100 yards long in 100 hours?
Pavlova-9 [17]

I think it would require 100 workers since 1 worker digs up 1 yard.

Hope this helps.

7 0
2 years ago
Fill in the blanks to complete the following statements about the line that can be described by the equation y= -3x - 7
Vadim26 [7]

Answer:

the answer is the initial value (y - coordinate of the y- intercept

6 0
3 years ago
The line y = hx - 2 where h > 0 meets the curve 3y² = 9x² - 6x + 1.
I am Lyosha [343]

Answer:

h=6

Step-by-step explanation:

since y =hx -2 is an equation for a line which intersects with the curve 3y^2 = 9x^2 - 6x +1. The point of intersection, let's say (x_1,y_1), should satisfy the two equations. As a result, the value of y in the second equation can be replaced with the value of y in the first equation as the following,

3y^2 = 3(hx-2)^2 = 9x^2 - 6x +1\\3(h^2x^2 -4hx + 4) = 9x^2 - 6x + 1\\3h^2 x^2 -12hx +12 = 9x^2 - 6x +1

therefore, the latter equation can be rewritten in a quadratic equation form as the following,

(9 - 3h^2) x^2 + (12h-6)x + (1-12) = (9 - 3h^2) x^2 + (12h-6)x -11 = 0

if the line is tangent to the curve, it means that the line touches the curve at one point, therefore the discernment of the second order equation will be equal to zero for the famous quadratic equation solution.

b^2 -4ac =0

where a=9-3h^2, b=12h-6 and c=-11, as a result, the following equations can be deduced,

(12h-6)^2 - 4*(9-3h^2)*(-11) = (144h^2 -144h +36) - (36 -12h^2)*(-11)=\\(144-(-12)*(-11)h^2 )  -144h +36 -(36*(-11)) =\\12 h^2 -144h +432 =0

therefore, dividing both sides by 12

h^2 -12 +36 =0\\(h-6)^2 =0\\h=6

8 0
2 years ago
Find the equivalent expression 11(3p+5x)+4x-x
Alex777 [14]

Hello there! :)

<em><u>Answer:</u></em>

<em><u>=33p+58x</u></em>

<em><u>*The answer must have a positive sign.*</u></em>

Step-by-step explanation:

Distributive property: a(b+c)=ab+ac

First, expanded form. Then you can also multiply from left too right.

11(3p+5x)=33p+55x

Next, rewrite the problem down.

33p+55x+4x-x

And finally, you add by the similar elements. Then you add by the numbers too.

55x+4x-x=58x

Final answer: → 33p+58x

Hope this helps!

Thanks!

Have a great day!

-Charlie

:)

:D


5 0
3 years ago
Read 2 more answers
I am supposed to simplify 1/a-b - 1/b-a
Andre45 [30]

Answer:

see explanation

Step-by-step explanation:

Given

\frac{1}{a-b} - \frac{1}{b-a}

Before subtracting the fractions, we require them to have common denominator.

Multiply the numerator/denominator of the second fraction by - 1

\frac{1}{b-a} × \frac{-1}{-1} = \frac{-1}{a-b}

We now have

\frac{1}{a-b} - \frac{-1}{a-b} ← common denominators

= \frac{1}{a-b} + \frac{1}{a-b}

= \frac{1+1}{a-b}

= \frac{2}{a-b}

5 0
3 years ago
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