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Natasha2012 [34]
3 years ago
6

What is the value, to the nearest tenth, of 15 x 3 - 12 x 2 when x = 2.5​

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
4 0

Answer:

159.4

Step-by-step explanation:

I'm assuming that it's supposed to be 15x^3-12x^2 because when you copy and paste the "^" gets cut out

15*2.5^3 - 12*2.5^2 = 234.375 - 75 = 159.375

rounded is 159.4

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Oduvanchick [21]

Answer:

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Step-by-step explanation:

Quadratic Equation = (-b±√b²-4(a)(c))÷2(a)

Get equation = to 0 by subtracting the 3 on the right side of the = sign

2x² - 12x + 5

Identify the variables

a=2

b=-12

c=5

Put them into the quadratic equation

(-(-12)± √-12² - 4(2)(5))÷2(2)

Simplify

(12 ±√144 - 40)÷4

(12±√104)÷4

Now split into 2 equations (one with addition one with subtraction) because of the ± then continue simplifying

(12 - √104)÷4                  (12 + √104)÷4

(12 - 10.198039)/4          (12 + 10.198039)/4

5.54950975                  0.45049025

Round

5.55                               0.45

6 0
3 years ago
What is the value of the expression 30+(-6)? <br>-180<br> -5 <br>5 <br>24​
tigry1 [53]

Answer:

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Step-by-step explanation:

30 + (-6) is equivalent to 30 -6, which is 24.

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3 years ago
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Vanyuwa [196]
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