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Arisa [49]
2 years ago
8

5x-4[7+(2x-4)], for x=-3 with shown work please

Mathematics
2 answers:
wel2 years ago
5 0

Answer: -3

Concept:

Here, we need to understand the idea of evaluation.  

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

<u>Given information</u>

x= -3

<u>Given expression</u>

5x - 4 [7 + (2x - 4)]

<u>Substitute x value into the expression</u>

=5(-3) - 4 [7 + (2(-3) - 4)]

<u>Simplify by multiplication</u>

=-15 - 4 [7 + (-6 - 4)]

<u>Simplify value in parentheses</u>

=-15 - 4 [7 + (-10)]

<u>Simplify value in bracket</u>

=-15 - 4 [-3]

<u>Simplify by multiplication</u>

=-15 - (-12)

=-15 + 12

=\boxed{-3}

Hope this helps!! :)

Please let me know if you have any questions

katovenus [111]2 years ago
5 0
5×(-3)-4{7+[2×(-3)-4]}
-15-4[7+(-6-4)]
=-15-4[7+(-10)]
=-15-4(7-10)
=-15-4×(-3)
=-15+12
=-3

Hope my answer helped u :)
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Step-by-step explanation:

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7 0
3 years ago
50 points! Please help me
Inga [223]

Answer:

x = 8

y = 14

Step-by-step explanation:

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x = 8

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2(8) + 6 + 13y - 24 = 180

16 + 6 + 13y - 24 = 180

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6 0
3 years ago
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Liono4ka [1.6K]
10(4^2-(9)

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3 0
3 years ago
Please help ASAP thank you!!!!
mart [117]

Answer:

41. f⁻¹(x) = -9x + 4

43. m⁻¹(x) = ∛(x-2)/4  

Step-by-step explanation:

41. y = (4-x)/9

swap x and y: x = (4-y)/9

solve y: 9x = 4-y

             y = -9x + 4

45. y = 4x³+2

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5 0
3 years ago
Which is the equation of the parabola?
mestny [16]

Answer:

  • y = -1/20(x + 3)²

Step-by-step explanation:

<u>Consider the parent function:</u>

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The graph of the function open up and the vertex is at the origin, the point (0, 0)

Now, if it opens down, it means it is a reflection of the parent function over x axis, hence it has a negative coefficient, the function becomes:

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The vertex is shifted to the point (-3, 0). It means the function also translated left by 3 units, the function becomes:

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<u>Since all the options have 1/20 as a coefficient, our function is:</u>

  • y = -1/20(x + 3)²

This is option B

6 0
3 years ago
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