4 years ago

Riley solved and equation as shown in the table

Mathematics

1 answer:

Mama L [17]4 years ago

6 0

She made the mistake in step 4

She should have divided by -2 not just 2 alone

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-3×+7y=5<br> -8×+14y=-10<br> By elimination

dimaraw [331]

-3x+7y=5 (x2) -> -6x+14y=10

-6x+14y=10
-8x+14y=-10
——————— -
2x=20
x=20/20
x=1

Susbstitute x=1,

-8x+14y=-10
-8(1)+14y=-10
-8+14y=-10
14y=-10+8
14y=-2
y=-2/14
y=-1/7

I hope it helps

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3 years ago

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3 years ago

(PLEASE HELP I WILL GIVE U A BRAINLY)Jonathan had a take out dinner that costed $22.50. He wanted to leave a 15% tip. What is th

timama [110]

Answer:

25.875

Step-by-step explanation:

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3 years ago

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Given that log 2 = 0.3010 and log 3 = 0.4771 , how can we find log 6 ?

bearhunter [10]

Answer:

$\sf \log_{10}6=0.7781$

Step-by-step explanation:

<u>Given</u>:

$\sf \log_{10} 2 = 0.3010$

$\sf \log_{10} 3 = 0.4771$

To find log₁₀ 6, first rewrite 6 as 3 · 2:

$\sf \implies \log_{10}6=\log_{10}(3 \cdot 2)$

$\textsf{Apply the log product law}: \quad \log_axy=\log_ax + \log_ay$

$\implies \sf \log_{10}(3 \cdot 2)=\log_{10}3+\log_{10}2$

Substituting the given values for log₁₀ 3 and log₁₀ 2:

$\begin{aligned} \sf \implies \log_{10}3+\log_{10}2 & = \sf 0.4771+0.3010\\ & = \sf 0.7781 \end{aligned}$

Therefore:

$\sf \log_{10}6=0.7781$

Learn more about logarithm laws here:

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2 years ago

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What is the area of the top of a table that is 8 feet by 12 feet?

laila [671]

Answer:

Step-by-step explanation:

use the formula l*w

8*12

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3 years ago

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