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Elden [556K]
4 years ago
14

3x−(2x+1) for x=7 5/13

Mathematics
1 answer:
marusya05 [52]4 years ago
8 0

Answer:

83/13 or 6.3846

Step-by-step explanation:

i subsituted for x and used a calculator

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32/34 Marks<br> Show that 155 can be expressed as the sum of a power of 2<br> and a cube number.
saul85 [17]

Answer:

155 =  {2}^{7}  +  {3}^{3}

Step-by-step explanation:

\because \: 155 = 128 + 27 \\  128 =  {2}^{7}  \:  \: and \:  \:  {3}^{3}  \\  \\ \huge \red{ \boxed{  \therefore \: 155 =  {2}^{7}  +  {3}^{3} }}

3 0
3 years ago
Suppose that the function u and w are defined as follows.
mars1129 [50]

That funky circle in the middle is the composition of the function. It asks you to take a function as an input and to yield an output that's another function. It's one of the five function operations, along with adding, subtracting, multiplying, and dividing.

When you compose, you might find the notation w(u(x)) easier to understand. It's saying evaluate u then evaluate w.

For our functions, the compositions are:

u(w(x)) = u(2x²) = -(2x²) - 2 = -2x² - 2

w(u(x)) = w(-x - 2) = 2(-x - 2)² = 2(x² + 4x + 4) = =2x²+ 8x +8

Now we evaluate each composition at 4.

u(w(4)) = -2(4²) - 2 = -2(16) - 2 = -32 -2 = -34

w(u(4)) = -2(2²) +8(2) + 8 = -2(4) + 16 + 8 = -8 + 16 + 8 = 16.

Thus, u(w(4)) = -34 and w(u(4)) = 16.

5 0
3 years ago
Find the volume of these rctangular prisms length=6.4mm width=2.5mm hight=7mm<br> step by step pls
Soloha48 [4]

Answer:

The volume of this rectangular prism is 112mm.

Step-by-step explanation:

volume \:  =  \: length \times width \times height \\ v = 6.4mm \times 2.5mm \times 7mm \\ v = 112mm

4 0
2 years ago
a triangle has sides 35cm, 54cm and 61cm long. find it's area, also find the smallest of its altitudes
KiRa [710]

Whats the length, base and height of the triangle

4 0
3 years ago
(13x^3-13x^4)+(6xy^3-9x^3)-(x^4+12xy^3)
Anestetic [448]

Answer:

-14x^4+4x^3-6xy^3

Step-by-step explanation:

8 0
3 years ago
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