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4 years ago

PLEASE HELP ASAP!!

1 answer:

4 0

It seems like you are solving a system of equations by elimination. One way to solve eliminate a variable would be to multiply the last equation by 3:

4x - 9y = 9 --------------> 4x - 9y = 9

3(-x + 3y = 6) -----------> -3x + 9y = 18

-------------------------

x = 27

The -9y and 9y cancel out if you multiply the bottom equation by 3.

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Find the range of this function

jeyben [28]

Answer:

Not sure!

Step-by-step explanation:

3 0

3 years ago

What is the value of the remaining variable? P=2L+2W; L=68, W=71

xz_007 [3.2K]

P= 278, because 2(68)=136 and 2(71)=142, so just add them together to get the answer.

8 0

3 years ago

Select the expression that has a value of 96.45

leonid [27]

Given:

Number is 96.45.

To find:

The expression that has a value of 96.45.

Solution:

In option a,

$0.9645\times 10^2=0.9645\times 100$

$0.9645\times 10^2=96.45$

In option b,

$9.645\div 10^1=\dfrac{9.645}{10}$

$9.645\div 10^1=0.9645\neq 96.45$

In option c,

$964.5\times 10^3=964.5\times 1000$

$964.5\times 10^3=964500\neq 96.45$

In option d,

$9645\div 10^3=\dfrac{9645}{1000}$

$9645\div 10^3=9.645\neq 96.45$

Therefore, the correct option is a.

5 0

3 years ago

The figure below shows a trapezoid, ABCD, having side AB parallel to side DC. The diagonals AC and BD intersect at point O.

Harlamova29_29 [7]

Answer:

Length of BO is three times the length of DO.

Step-by-step explanation:

In trapezoid ABCD, $CD\ ||\ AB$

In ΔCDO and ΔABO,

$m\angle CDO=m\angle ABO$ (Alternate interior angles)
$m\angle DCO=m\angle BAO$ (Alternate interior angles)

So, $\Delta CDO\sim \Delta ABO$ according to Angle-Angle similarity.

Therefore, the ratio of corresponding sides will be same.

$\Rightarrow \dfrac{OD}{OB}=\dfrac{OC}{OA}$

$\Rightarrow \dfrac{OD}{OB}=\dfrac{OC}{3\cdot OC}$

$\Rightarrow \dfrac{OD}{OB}=\dfrac{1}{3}$

$\Rightarrow OB=3\cdot OD$

5 0

3 years ago

Read 2 more answers

Determine the general rule (Tn)

Alina [70]

The general rule of what

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3 years ago