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3 years ago

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Mathematics

1 answer:

Oksana_A [137]3 years ago

3 0

Answer:

1: Sides

2: like terms

Step-by-step explanation:

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The population of a city is expected to increase by 7.5% next year. If p represents the current population, which expression rep

qaws [65]

Answer:

Population next year = 1.075p

Step-by-step explanation:

The current population can be represented by 1 p the increase in the population number by next year is 7.5% p or 7.5/100 p that equals to 0.075p. The expression that represents the expected population by next year is:

Population next year = This year population + expected growth

Population next year = 1p + 0.075p = 1.075p

4 0

3 years ago

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Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula

statuscvo [17]

Answer:

$x=0.75 \pm 2.47067i$

Step-by-step explanation:

Quadratic Formula: $x=\frac{-b \pm \sqrt{b^2-4ac} }{2a}$

√-1 is imaginary number i

Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

$x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}$

$x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}$

$x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}$

$x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}$

$x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}$

$x=\frac{4.5 \pm i14.824 }{6}$

$x=0.75 \pm 2.47067i$

7 0

3 years ago

What is a system of equations for the following situation? There is a total of 30 questions on a test. Some questions are multip

Alexxx [7]

Answer:

m + s = 30

2m + 6s = 100

Step-by-step explanation:

took the test

8 0

3 years ago

When calculating the slope of a line, the horizontal distance between two points on the line is called the "rise" and the vertic

s2008m [1.1K]

Answer: FALSE

The vertical line is Y (rise) and the horizontal line is X (run)

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3 years ago

Question 57 need help

prisoha [69]

Okay so first we need to find the height ofn one hay barrel. To do this we must use the equations v= h×w×l

We already know 3 out of the 4 variables in the equations, in this case we are given the volume so we must work backwards.

The equation will look like this:
$10 \frac{2}{3} = h \times (1 \frac{1}{3} ) \times 4$
First we must mulitpy 4 and 1 1/3 to get 16/3. The equation will now look like:
$10 \frac{2}{3} = h \times \frac{16}{3}$
Next divide 16/3 from h then from 10 2/3 to get :
$2 = h$
The height is 2ft. Finally multiply 2 by the number of hay barrels (8) placed upon each other becuase we're finding the height and you will get your answer of 16 ft in height.

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3 years ago

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