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SpyIntel [72]
3 years ago
7

What is the value of the function y=2x−3 when x=−1 ?

Mathematics
1 answer:
frez [133]3 years ago
4 0
Hello :)

When x=-1
y=2×(-1)-3=-2-3= -5



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If 2x+ y= 10 and y=3x find the value of both x and y
Marat540 [252]

Given the set of equations:

2x + y = 10

y = 3x

Let's solve for x and y.

Here, let's use substitution method.

Substitute 3x for y in equation 1:

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2x + 3x = 10

5x = 10

Divide both sides by 5:

\begin{gathered} \frac{5x}{5}=\frac{10}{5} \\  \\ x=2 \end{gathered}

In equation 2, substitute 2 for x to find y.

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y = 3(2)

y = 6

Therefore, we have:

x = 2 and y = 6

ANSWER:

x = 2, y = 6

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1 year ago
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3 years ago
What is f(-3) for the function f(a). =-2ax2-5a+4
Nataly_w [17]

The value of function f(x). =-2ax² -5a + 4 at a = -3 will be -23a + 2.

<h3>What is a function?</h3>

The machine will only accept specified inputs, described as the function's domain, and will potentially produce one output for each input.

For example y = sinx ,  y = x + 3 ets.

Given,

f(x)  = - 2ax² -5a + 4

x = -3

f(-3) =  - 2a(-3)² -5a + 4

f(-3) = -18a - 5a + 4

f(-3) = 23a + 2

Hence the value of function f(x). =-2ax² -5a + 4 at a = -3 will be -23a + 2.

For more about the function

brainly.com/question/23712366

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Step-by-step explanation:

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