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bazaltina [42]
3 years ago
9

What is the result of subtracting the second equation from the first?

Mathematics
1 answer:
saul85 [17]3 years ago
7 0

Answer:

11x-8y=-9

Step-by-step explanation:

we have

8x-4y = -4 ----> First equation

-3x+4y=5 ----> Second equation

we know that

To subtract the 2nd equation from the first, negate all three of the second equation terms:  3x-4y=-5

and then adds this result with the first equation

8x-4y = -4\\3x-4y=-5\\-------\\8x+3x-4y-4y=-4-5\\11x-8y=-9

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An employee at a company that assembles chandeliers is packing boxes for shipping. In the first box, he packed 5 small chandelie
valkas [14]

Answer:

24

Step-by-step explanation:

5 0
3 years ago
Approximate: log 5 ^4/7
wolverine [178]

Do you mean the following:

log(5^(4/7))=around 0.4

log(5)^(4/7)=around 0.815

log(5^4)/7= same thing as top one

log((5^4)/7)=around 1.95

6 0
3 years ago
Read 2 more answers
6. Ed drives from Jefferson to Holden, a distance of 250 miles. He then travels on to
andreev551 [17]

Answer:

The constant speed with Ed is travelling is 60 mile per hour

Step-by-step explanation:

Given as :

The distance cover to travel from Jefferson to Holden is (D1) 250 miles

The distance cover to travel from Holden to Paxton is (D2) 50 miles

Total time taken to complete entire journey = T = 5 hours

Let The constant speed of Ed = S mph

Time = \frac{Distance}{Speed}

Or, Time = \frac{D1}{S}  + \frac{D2}{S}

Or, 5 hour =  \frac{250}{S}  + \frac{50}{S}

Or, 5 × S = 250 + 50

So,  5 × S = 300

∴           S = \frac{300}{5}

I.e         S = 60 mph

Hence , The constant speed with Ed is travelling is 60 mile per hour Answer

6 0
3 years ago
The scale factor of ∆RST to ∆DEC is 3 : 13. What is the scale factor of ∆DEC to ∆RST? Select one: a. 39 : 1 b. 1 : 39 c. 13 : 3
Katena32 [7]

Answer:

ΔDEC/ΔRST is 13/3 it is c

Step-by-step explanation:

ΔRST/ΔDEC = 3/13 so the inverse is 13/3

5 0
3 years ago
What is the interquartile for this set of data? 11,19,35,42,60,72,80,85,88
exis [7]

Answer:

55.5

Step-by-step explanation:

find the median - in this case it's 60

then group the upper and lower halves of the data:

(11, 19, 35, 42) 60 (72, 80, 85, 88)

now we find the medians of those sets:

35 + 19/2 = 54/2 =27

80 + 85/2 = 165/2 = 82.5

then subtract those two medians to find the interquartile:

82.5 - 27 = 55.5

4 0
3 years ago
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