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julsineya [31]
4 years ago
15

Evaluate f(4) if f(x) =

Mathematics
2 answers:
kogti [31]4 years ago
7 0
It’s 4 hope this helped:)
abruzzese [7]4 years ago
4 0

Answer:

f(4) = 4

Step-by-step explanation:

We have x = 4 so we use the middle line of the piecewise function since 0≤x≤4

f(x) = x

f(4) = 4

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Please Help
o-na [289]

Answer:

23

Step-by-step explanation:

-The length of the cubes side is (x-5) and the total surface area is 1944 sq units.

-We apply the formula for surface area and equate to solve for x:

A=6s^2\\\\1944=6(x-5)^2\\\\324=(x-5)^2\\\\324=x^2-10x+25

#Equate to zero as below:

324=x^2-10x+25\\\\x^2-10x+25-324=0\\\\x^2-10x-299=0\\\\\# Quadratic \ Formula:\\\\x_{1,2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\\\=\frac{10\pm\sqrt{(-10)^2-4(1\times-299)}}{2\times1}\\\\x_1=23, \ \ \ x_2=-13

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Hence, the value of x is 23

8 0
4 years ago
Are the ratios 20:4 and 5:1 equivalent?
Natalka [10]

Answer:

Yes

Step-by-step explanation:

20 divided by 4 is 5

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6 0
3 years ago
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Find the product. Write your answer in scientific notation.<br><br> (7 x 10^-2) (8 x 10^5) =
lakkis [162]

Answer:

7×10^(-2)×8×10^5 = 56000

convert to scientific notation = 5.6 × 10^4

(scientific notation)

= 5.6e4

(scientific e notation)

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(engineering notation)

(thousand; prefix kilo- (k))

= 56000

(real number)

Step-by-step explanation:

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3 years ago
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adelina 88 [10]

Answer:

24 = questions on test

Step-by-step explanation:

Questions answered correctly = questions on test * percent answered correctly


We know that she answered 18 correctly and that 75% were answered correctly

Substitute this information into the equation

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Divide by .75 on each side

18/.75 = questions on test *.75/.75

24 = questions on test

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3 years ago
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