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Katena32 [7]
3 years ago
14

-4d + 2(3 + d) = -14 Please help

Mathematics
2 answers:
soldi70 [24.7K]3 years ago
6 0
-4d + 2(3+d)= -14
distribute the 2(3+d)
-4d + 6+ 2d= -14
Combine the like terms
-4d + 2d + 6= -14
-2d + 6 = -14
subtract 6 to -14 
-2d = -20
divide by -2
d= -20/-2
d= 10
Check your answer 
-4(10) + 2(3+ 10) = -14
-40 + 6 + 20
-40 + 26= -14
UkoKoshka [18]3 years ago
6 0
It is -20 divides by -2
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If tile costs $8.50 per square foot, how much does it cost per inch?
Sphinxa [80]

Answer:

$0.06 per square inch

Step-by-step explanation:

The question should be:

<em>"If tile costs $8.50 per square foot, how much does it cost per square inch?"</em>

<em />

To solve this, we basically need a conversion from feet to inches. BUT 2 times, since we are talking about "square feet" and "square inches".

We know 1 feet = 12 inches

Also, since we are going from square feet to square inches [big to small], we have to divide TWICE.

Thus, we will have:

\frac{8.5}{12*12}

We are dividing 8.5 (the cost) by 12, 2 times since we want square feet in square inches. The answer is:

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6 0
3 years ago
The number of miles Ford trucks can go on one tank of gas is normally distributed with a mean of 350 miles and a standard deviat
kati45 [8]

Answer:

The probability that a randomly chosen Ford truck runs out of gas before it has gone 325 miles is 0.0062.

Step-by-step explanation:

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The random variable <em>X</em> is normally distributed with mean, <em>μ</em> = 350 miles and standard deviation, <em>σ</em> = 10 miles.

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<u>Statement                                                  Reason                                             </u>

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