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3 years ago

12

A 5x5 table is filled with numbers (one number per cell). It is known that the product of 5 numbers in each column is negative.

Is it possible that the product in each row is positive?

1 answer:

Advocard [28]3 years ago

5 0

Answer:

Yes

Step-by-step explanation:

A negative multiplied by another negative will turn into a positive. A positive multipled by a negative will stay as a negative.

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??????????? Neeeeed help

murzikaleks [220]

Answer:

it would be 3 tons and 80 ibs

hope that helps...if i am wrong, i am sorry :-)

Step-by-step explanation:

4 0

3 years ago

Before the industrial revolution in 1800 the concentration of carbon in Earth’s atmo- sphere was 280 ppm. The concentration in 2

slega [8]

Answer: There is increase of 4.255 in the amount of carbon in the atmosphere.

Step-by-step explanation:

Since we have given that

Concentration of carbon in Earth's atmosphere in 1800 = 280 ppm

Concentration of carbon in Earth's atmosphere in 2015 = 399 ppm

We need to find the percentage increase in the amount of carbon in the atmosphere.

So, Difference = 399-280 = 119 ppm

so, percentage increase in the amount of carbon is given by

$\dfrac{Difference}{Original}\times 100\\\\=\dfrac{119}{280}\times 100\\\\=\dfrac{11900}{280}\\\\=42.5\%$

Hence, there is increase of 4.255 in the amount of carbon in the atmosphere.

4 0

3 years ago

The mean temperature for the first 7 days in January was 4 °C. The temperature on the 8th day was 3 °C. What is the mean tempera

Bad White [126]

Answer:

Mean temperature for the first 8 days was $3.88^\circ$

Step-by-step explanation:

Mean = $\frac{4\cdot 7+3\cdot 1}{8}$

$=3.88^\circ$

Best Regards!

3 0

3 years ago

Read 2 more answers

What kind of triangle is ABC? Select all that apply.

iVinArrow [24]

This is a right triangle. If the triangle were laid down, on an end, a right angle would be visible.

4 0

2 years ago

Solve the following system of equations using the substitution method.

BartSMP [9]

Answer:

B

Step-by-step explanation:

First label the equations.

6x +3y= 18 -----(1)

y= -2x +5 -----(2)

subst. (2) into (1):

6x +3(-2x +5)= 18

6x +3(-2x) +3(5)= 18 (expand)

6x -6x +15= 18

15= 18 (simplify)

(reject)

There is no solution.

<u>Further explanation</u><u>:</u>

If I rewrite the first equation into the form of y=mx+c, I would get

6x +3y=18

3y= 18 -6x (bring y term to one side)

y= 6- 2x (÷3 throughout)

y= -2x +6

Notice that the gradients of both lines are equal ( -2). This implies that they are parallel to each other and will never meet. Hence there are no solutions.

3 0

3 years ago