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3 years ago

(Picture Included) 20 points - can someone solve 11, 12, 13, and 15?

Mathematics

1 answer:

slavikrds [6]3 years ago

6 0

11. 3(5) + 2(4)

15 + 8 = 13

12. x= -12

13. -30

15. x = 44

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Can you please help me solve this equation? x+9−3≤14

aleksley [76]

X+9-3≤14

Add 3 to the other side. (do the inverse of subtraction)

x+9≤17

Subtract 9 on both sides. (the inverse of addition)

x≤8

I hope this helps!
~kaikers

5 0

3 years ago

(1/4)^3z-1 =16^z+2*64^z-2 Z=___ Please help

wariber [46]

Answer:

Z = 0.198877274

Step-by-step explanation:

$(\frac{1}{4})^{3z-1} = 16^z + 2*16^{z-2}\\4^{1-3z} = 4^{2z} + 4^{\frac{1}{2}}*4^{2z-4}\\4^{1-3z} = 4^{2z} + 4^{2z-4+\frac{1}{2}}\\4^{1-3z} = 4^{2z} + 4^{2z-\frac{7}{2}}\\4^{1-3z} = 4^{2z} *(1+ 4^{-\frac{7}{2}})\\4^{1-3z} = 4^{2z} *(1+ 2^{-7})\\4^{1-3z} = 4^{2z} *(1+ \frac{1}{128} )\\4^{1-3z} = 4^{2z} *(\frac{129}{128} )\\Taking\;\; Logarithm\;\; with\;\; base\;\; 4\\Log_4(4^{1-3z}) = Log_4(4^{2z}) + Log_4(\frac{129}{128})\\1-3z = 2z + 0.005613627712 \\5z = 0.994386372\\z = 0.198877274$

Hence, the value of Z = 0.198877274

8 0

3 years ago

Read 2 more answers

Use substitution to solve the system of equations.

kakasveta [241]

Answer:

C (let me know if I am wrong!)

Step-by-step explanation:

We need to solve the equation.

If 5x+y = -24, then -24 - 5x = y.

x+ 3(-24-5x) = -2

= -14x-72=-2

= -14x-72+72=-2+72

= -14x=70

= -5

If x = -5, then -5 + 3y = -2.

3y = -2+5

3y = 3

y=1

So the answer is C.

4 0

3 years ago

Ugh help again i had to do it again

Liono4ka [1.6K]

Answer:

Step-by-step explanation:

7 0

2 years ago

Find the value of <img src="https://tex.z-dn.net/?f=%20log_%7B8%7D%5E%7B512%7D%20" id="TexFormula1" title=" log_{8}^{512} "

valina [46]

Answer: 3
Explanation: logarithm base 8 of 512 is 3

8 0

2 years ago