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Dafna1 [17]
2 years ago
12

1. Solve the following system of equations by elimination. What is the value of x?

Mathematics
2 answers:
mrs_skeptik [129]2 years ago
3 0

Answer:

x = 1 (Option C)

Step-by-step explanation:

3x - 4y = -5 (1)

-3x - 4y = -11 (2)

On adding

3x - 4y - 3x - 4y = -11 + 5

6x = 6

x = 6/6

x = 1

artcher [175]2 years ago
3 0

Elimination method is a method of eliminating one of the variables from the two equations whose remaining variables will be simplified..

3x - 4y= -5 (×1) 3x - 4y= -5

-3x - 4y= -11 (×1) <u>-3x</u><u> </u><u>-</u><u> </u><u>4y</u><u> </u><u>=</u><u> </u><u>-11</u><u> </u><u>(</u><u>-</u><u>)</u>

6x = 6

6x/6 = 6/6

x = 1

the value of x is <em><u>1</u></em>

Answer: Option [C]

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EASY 7TH GRADE MATH 6 out of 8 dentists recommend crest toothpaste. In a group of 156 dentists, how many of them recommend crest
Novay_Z [31]

Answer:

117

Step-by-step explanation:

6/8 = ?/156

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2 years ago
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egoroff_w [7]

Answer:

D. 10 square root 3 is your answer

Step-by-step explanation:

Here is what you do.

<em>square root 30 = 3 x 2 x 5 </em>

<em>square root 10 = 2 x 5</em>

Add them together.

<em>3 x 2 x 2 x 5 x 5 </em>

<em>3 x 4 x 25.</em>

4 and 25 can come out of the square root.

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4 0
2 years ago
How do you get statistics from percentages
Nikitich [7]

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Divide the target demographic by the entire population, and then multiply the result by 100 to convert it to a percentage.  

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3 years ago
Type the correct answer in the box. Round your answer to the nearest integer.
umka21 [38]

Answer:

m∠ADC = 132°

Step-by-step explanation:

From the figure attached,

By applying sine rule in ΔABD,

\frac{\text{sin}(\angle ABD)}{\text{AD}}=\frac{\text{sin}(\angle ADB)}{AB}

\frac{\text{sin}(120)}{35}=\frac{\text{sin}(\angle ADB)}{30}

sin(∠ADB) = \frac{30\text{sin}(120)}{35}

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m∠ADB = \text{sin}^{-1}(0.74231)

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3 years ago
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bixtya [17]

Answer:

y = 2.1x +5, 21 miles

Step-by-step explanation:

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Since she tipped the driver $5, that is a flat rate and that will be our y-intercept. Since it costs $2.10 per mile, we need to multiply that number by the number of miles

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In order to figure out how many miles Ann lives from the airport, we need to substitute y for her grand total that she was charged

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3 years ago
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