3 years ago

If two half planes never intersect, then their system of inequalities has no solution, true or false ?

1 answer:

7 0

Well intersection is a solution. Infinity amount of solutions is a line on top of another line. No solution are parallel lines.

Hope this helps. Brainliest?

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6. How much heat is lost cooling 25 grams of water from 90°C to 45°C?

sergey [27]

Answer:

4,7025 (kJ).

Step-by-step explanation:

1) according to the condition: m=25 gr.; t₂=90; t₁=45; c=4.18 J/(g°C);

2) the formula of required heat is

Q=c*m*(t₂- t₁);

3) according to the formula of heat:

Q=4.18*25*45=4702.5 (J).

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3 years ago

A coin contains 1.25, point grams of nickel and 3.75, point, grams of copper, for a total weight of 5 grams. What percentage of

jarptica [38.1K]

3.75 grams of copper / 5 total grams =

.75 = 75%

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4 years ago

What is the first step to solving this<br> equation?<br> 3x+10=7x-2

lozanna [386]

Answer:

3x+10

Step-by-step explanation:

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4 years ago

Read 2 more answers

What is the value of x if e^3x+6 = 8?

topjm [15]

We can write any number n in the form $e^{\ln(n)}$ , since $e^x$ and $\ln(x)$ are inverse functions, so that

$e^{3x+6} = 8 \iff e^{3x+6} = e^{\ln(8)}$

The bases are the same on both sides, so the exponents must be equal.

$3x + 6 = \ln(8)$

Solve for x :

$3x = \ln(8) - 6$

$x = \boxed{\dfrac{\ln(8) - 6}3}$

5 0

3 years ago

-3+15mx=q <br><br> Solve for m

rjkz [21]

Answer:

m = q+3/15x

step-by-step explanations:

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3 years ago