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3 years ago

Choose two axioms that allow 6 + (x + 5) to be written x + 11.

Mathematics

2 answers:

Xelga [282]3 years ago

8 0

Answer:

commutative - addition

associative - addition

Step-by-step explanation:

commutative is when you can move them in any order and associative can be added in any order.

So you move (x+5) to look like (x+5)+6 (commutative)

then switch parenthesis : x+(5+6) (associative)

then x+11.

kap26 [50]3 years ago

4 0

Associative means that you can move the parenthesis around the problem and still get the same answer. like (4+2)+3=4+(2+3)
first & sixth are the true

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2 Points

myrzilka [38]

Answer:

Step-by-step explanation:

First find the circumference of the circle with radius of 9 inches:

$C=2\pi r=2\pi \cdot 9=18\pi \ inches$

The full angle has 360°, so, to find the length of the arc DE, you can write:

$360^{\circ}\ - \ 18\pi \\ \\145^{\circ}\ - \ x$

which yields a proportion:

$\dfrac{360}{145}=\dfrac{18\pi}{x}\\ \\360x=145\cdot 18\pi\\ \\x=\dfrac{145\cdot 18\pi }{360}=\dfrac{145\pi}{20}=7.25\pi\approx 22.8\ inches$

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3 years ago

Round: 816.868906667<br> To the nearest hundredth

zloy xaker [14]

Answer:

The answer is 816.87

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3 years ago

Marty is taking piano lessons. She is going to practice every afternoon. The 1st week she practiced for 11 minutes each day. The

defon

Answer:

$m=7w+4$

Step-by-step explanation:

<u>Linear Modeling</u>

It consist is setting up a linear relationship between two variables, given some experimental data. Only 2 points are needed to set up the equation of a line, but if more than 2 points are used, then the result should use statistical approaches like linear regression to find the best-fit line.

For the question at hand, Marty practices his piano lessons 11 minutes the week #1. It provides the first point (1,11). He practices 25 minutes per day on the third week. It gives us another point (3,25). This is enough to find the equation of a line. The general formula for a line, having two points (m1,w1) (m2,w2) is

$\displaystyle m-m_1=\frac{m_2-m_1}{w_2-w_1}(w-w_1)$

Let's plug in our values

$\displaystyle m-11=\frac{25-11}{3-1}(w-1)$

Simplifying:

$m-11=7w-7$

$\boxed{m=7w+4}$

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4 years ago

A boat traveled 280 miles downstream and back. The trip downstream took 7 hours. Trip back took 14 hours. What is the speed of t

nexus9112 [7]

Speed of the boat = u
speed of the current = v

In downstream,
u - v = 280/7
u - v = 40

In upstream,
u + v = 280/14
u + v = 20

Add both equations
2u = 60
u = 30

v = -10

Speed of the boat = 30 km/h

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3 years ago

In this expression: 5x – (12 -6), x is what we called the ....?

Sav [38]

Answer:

x is the variable

Step-by-step explanation:

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3 years ago

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