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3 years ago

Lines AB and BC are perpendicular. The dashed rays bisect angles ABD and

Mathematics

1 answer:

andrew-mc [135]3 years ago

4 0

It is 45 because angle ABC is 90 degrees and line D splits each side into two equal parts and half of 90 is 45 degrees

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Which of the options represents the resulting equation after an equivalent expression for y is substituted into the second equat

Nina [5.8K]

Answer:

Correct choice is D

Step-by-step explanation:

Given the system of two equations:

$\left\{\begin{array}{l}4x+y=8\\6x-9y=12\end{array}\right..$

Fro mthe first equation

$y=8-4x.$

Substitute into the second equation $8-4x$ instead of y:

$6x-9(8-4x)=12.$

Note that $8-4x=-4x+8,$ then the second equation will take look

$6x-9(-4x+8)=12.$

6 0

3 years ago

Read 2 more answers

How to slove and the answer

Alenkinab [10]

Just divide the percentage by the amount they are asking

5 0

3 years ago

How to solve Question 3（c）？

BARSIC [14]

From your work on parts (a) and (b), you know that
.. r = 3.50
.. s = 140
The composite index of production cost from 2007 to 2009 is 114.2.

(c) If the production cost in 2007 was RM50, then in 2011 it was
.. RM50 * (2009 index) * (2011 index) = RM50 * 1.142 * 1.200 = RM68.52

7 0

3 years ago

Question is below (wasn't sure about the answer)

Paha777 [63]

Answer: Choice A)

$H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

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Work Shown:

$SA = 2(LW + LH + HW)\\\\2(LW + LH + HW) = SA\\\\LW + LH + HW = \frac{SA}{2}\\\\LH + HW = \frac{SA}{2} - LW\\\\H(L + W) = \frac{SA}{2} - LW\\\\H = \frac{\frac{SA}{2} - LW}{(L + W)}\\\\H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

This is not the only way to solve for H.

3 0

2 years ago

How would you divide 5.6 into five even pieces

stealth61 [152]

U do 5.6/5; that would get you to 1.12. so 5.6/5=.12. that;s ur answer

5 0

3 years ago