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guajiro [1.7K]
3 years ago
15

What sentence is correct? 1) -2/5 = 0.4 (2) -2/5 = -0.4 (3) -5/2 = 2.5 (4) 5/2 = -2.5

Mathematics
1 answer:
Georgia [21]3 years ago
4 0

Answer:

Sentence (2) -2/5=-.4

Step-by-step explanation:

You can prove by doing the division.

-2/5=-4/10=-.4

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I need help I don’t understand I tried a billion times
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4 years ago
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Graph the functions and approximate an x-value in which the exponential function exceeds the polynomial function. y = 4x y = 7x2
nordsb [41]

Answer:

The Exponential function is

y=4^x

And the polynomial function is

y=7 x^2 +4 x -2

And, we have to find the value of x for which, exponential function exceeds the polynomial function which can be written as

4^x> 7 x^2 +4 x -2

1. When , x= -1

LHS

4^{-1}=\frac{1}{4}=0.25

RHS

=7*(-1)^2 +4 *(-1)-2\\\\=7-4-2=1

2. When , x=0

L HS

 4^0=1

RHS

7*0+4*0-2= -2

3. When ,x= 0.5

L HS

 4^{0.5}=2

RHS

=7*0.25 +4*0.5 -2\\\\= 1.75+2-2\\\\=1.75

4. When , x=2

LHS

 4^{2}=16

RHS

=7*4^2+4*4-2\\\\=112+16-2\\\\=126

The Minimum value for which  exponential function exceeds the polynomial function is , x= 0.5

But,there is other value for which  exponential function exceeds the polynomial function is , x=2.

5 0
3 years ago
Simplify the expression:<br><br> 4(-4 + 2z)=
alisha [4.7K]

Answer:

-16 + 8z

Step-by-step explanation:

4(-4 + 2z)=

Distribute the 4

4*-4 + 4(2z)

-16 + 8z

7 0
3 years ago
What is the least common denominator of 3/4, 4/5, 2/3? A. 60 B. 15 C. 12 D. 20
Rasek [7]
The LCM of 3/4 4/5 and 2/3 is A, 60.
6 0
3 years ago
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