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3 years ago

For the following system, use the second equation to make a substitution for x in the first equation.

1 answer:

3 0

The answer is B. In the second equation, when you solve for x, it will be equal to y - 3. Then substitute that with x and 3(y - 3) +2y = 7 is what you get.

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Solve equation. Verify answer 14=-2w

notka56 [123]

Answer:

w = -7

Step-by-step explanation:

Isolate the variable, w. Note the equal sign, what you do to one side, you do to the other.

Divide -2 from both sides:

(14)/-2 = (-2w)/-2

(14)/-2 = w

Note that when you are dividing:

1 negative & 1 positive sign will result in a negative answer
2 negative sign will result in a positive
2 positive sign will result in a positive

In this case:

(14)/-2 = -7

-7 is your answer for w.

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2 years ago

The greatest factor that two or more numbers have in common is the

elena55 [62]

Greatest common factor.

7 0

3 years ago

Solve the following system of equations.

sasho [114]

X is minus 2
y is equal to 1

4 0

3 years ago

Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much al

UNO [17]

After 12 hours the pound would have 720 pounds of algae.

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3 years ago

A new centrifugal pump is being considered for an application involving the pumping of ammonia. The specification is that the fl

ollegr [7]

Answer:

from the t-distribution table, at df = 7 and t = 2.23

Lies p-values [ 0.05 and 0.025 ]

Hence;

0.025 < p-value < 0.05

Step-by-step explanation:

Given that;

$x^{bar}$ = 6.5 gpm

μ = 5 gpm

n = eight runs = 8

standard deviation σ = 1.9 gpm

Test statistics;

t = ( $x^{bar}$ - μ) / $\frac{s}{\sqrt{n} }$

we substitute

t = (6.5 - 5) / $\frac{1.9}{\sqrt{8} }$

t = 1.5 / 0.67175

t = 2.23

the degree of freedom df = n-1 = 8 - 1

df = 7

Now, from the t-distribution table, at df = 7 and t = 2.23

Lies p-values [ 0.05 and 0.025 ]

Hence;

0.025 < p-value < 0.05

3 0

2 years ago