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2 years ago

Daniel practises his guitar for 40 minutes every day

Mathematics

1 answer:

Juliette [100K]2 years ago

6 0

It would take him 50 years

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Two equations are given below: a – 3b = 9 a = b – 3 What is the solution to the set of equations in the form (a, b)?

Vilka [71]

A-3b=9
a=b-3

b-3-3b=9
-2b-3=9
-2b=12
2b=-12
b=-6

a=-6-3
a=-9

Solution: (-9,-6)
----
Check:
-9=-6-3
-9=-9
TRUE

7 0

3 years ago

Read 2 more answers

7^16/7^12=7^-18/? what is the missing denominator

creativ13 [48]

$\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\qquad \qquad 
a^{{{ n}}}\implies \cfrac{1}{a^{-{{ n}}}}\\\\
-------------------------------\\\\$

$\bf \cfrac{7^{16}}{7^{12}}=\cfrac{7^{-18}}{x}\implies x\cdot 7^{16}=7^{12}\cdot 7^{-18}\implies x\cdot 7^{16}=7^{12-18}
\\\\\\
x\cdot 7^{16}=7^{-6}\implies x=\cfrac{7^{-6}}{7^{16}}\implies x=\cfrac{7^{-6}\cdot 7^{-16}}{1}\implies x=7^{-6-16}
\\\\\\
\boxed{x=7^{-22}}\implies x=\cfrac{1}{7^{22}}$

4 0

3 years ago

The square of even numbers are even number .show?

natima [27]

Answer:

. It’s because a prime factor of all even numbers is 2. Therefore the prime factors of all even squares includes two, therefore, the square must be even.

3 0

2 years ago

4(4-w)=3(2w+2)<br>find w

Travka [436]

Answer:

Step-by-step explanation:

4(4-w) = 3(2w+2)

Use distributive property:

16 - 4w = 6w + 6

+4w +4w

------------------------

16 = 10w + 6

-6 -6

-------------------------

10 = 10w

---- -----

10 10

1 = w

Hope this helped.

7 0

3 years ago

Read 2 more answers

Graph a line with a y-intercept of -3 and a slope of 43 .

nasty-shy [4]

Answer: HERE IS THE GRAPH AND PLS CORRECT ME IF I"M WRONG :)

Step-by-step explanation:

8 0

2 years ago