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Sloan [31]
3 years ago
10

Which first step for solving the given system using substitution results in an equation without fractions?

Mathematics
1 answer:
My name is Ann [436]3 years ago
7 0

Step-by-step explanation:

Solve for y in the first equation

3x+y=9

y=8-3y

Hence, no fraction is formed

So, second option is correct

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Re-write the quadratic function below in Standard Form<br> y= –2(x + 5)(x – 4)
Naddik [55]

Answer:

y = - 2x² - 2x + 40

Step-by-step explanation:

Standard form of a quadratic is y = ax² + bx + c : a ≠ 0

Given

y = - 2(x + 5)(x - 4) ← expand factors using FOIL

  = - 2(x² - 4x + 5x - 20)

  = - 2(x² + x - 20) ← distribute parenthesis by - 2

  = - 2x² - 2x + 40 ← in standard form

6 0
3 years ago
Susie is participating in a bake sale for a fundraiser. She baked 8 pies to sell. Two pies weigh 105 g each, one pie weighs 106
MAVERICK [17]

Answer:

105.25 g

Step-by-step explanation:

The average weight is the sum of the weights divided by the number of pies.

(105 + 105 + 106 + 108 + 108 + 103.5 +102 +104.5) / 8

= 105.25

3 0
3 years ago
A student used the complex fraction
34kurt

Answer:1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
An engineer measures the peak current (in microamps) when a solution containing an amount of nickel (in parts per 106 ) is added
dangina [55]

Answer:

B. decrease the intercept, increase the slope

Step-by-step explanation:

A slope indicates the steepness of a line while the intercept points the location where it intercepts its axis. The linear relationship between can be defined using the intercept and the slope. Both concepts are used to estimate the average range of change. Since we are trying to add a peak current value of 0.38 which is lesser than the average, the intercept of the graph would therefore decrease and the slope increase.

7 0
3 years ago
Find the value of x.
nikklg [1K]

Answer:

x = 13

Step-by-step explanation:

Sum or interior angles of a triangle is 180,

6x + 19 + 5x - 15 + 3x - 6 = 180

6x + 5x + 3x + 19 - 15 - 6 = 180

14x + 19 - 21 = 180

14x - 2 = 180

14x = 180 + 2

14x = 182

x = 182 / 14

x = 13

5 0
3 years ago
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