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3 years ago

14

What is the solution to the linear equation? 2.8y+6+0.2y=5y-14

2 answers:

Roman55 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

D)10

PtichkaEL [24]3 years ago

5 0

2.8y+6+0.2y=5y-14
Combine like terms
3y+6=5y-14
Subtract 6 from both sides
3y=5y-20
Subtract 5y from both sides
-2y=-20
Divide both sides by -2

Y=10

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A box of chalk and 2 staplers cost $10. three boxes of chalk and 2 staplers cost $18. find the total cost of 1 box of chalk and

Alchen [17]

Here is the solution of the given problem above:
Let s= staples
<span>c = chalk</span>

<span>c + 2s = 10 </span>
<span>3c + 2s = 18 </span>

<span>-c-2s = -10 </span>
<span>3c + 2s = 18 </span>

<span>2c = 8 </span>

<span>c = 4 </span>
<span>s = 3
</span>Therefore, the price per chalk box is $4 and per stapler is $3.
So the total cost of the chalk and stapler would be $7.
Hope this is the answer that you are looking for. Thanks for posting it here in brainly.

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4 years ago

You are randomly selecting 3 cans of regular and diet cola, but assume that there are 6 cans of regular cola and 7 cans of diet

gayaneshka [121]

Answer:0.367

Step-by-step explanation:

Given

There are 6 cans of regular and 7 cans of diet cola

number of ways of selecting 2 regular colas and 1 can of diet cola is

$\Rightarrow ^6C_2\times ^7C_1$

The total no of ways of selecting 3 items out of 13 items is

$\Rightarrow ^{13}C_3$

Probability is

$\Rightarrow P=\dfrac{^6C_2\times ^7C_1}{^{13}C_3}=\dfrac{105}{286}\\\Rightarrow P=0.367$

6 0

3 years ago

Line MN passes through points M(4,3) and N(7,12).if the equation of the line is written in slope-intercept, form, y=my+b, what i

Brums [2.3K]

-9

This should be right. Hope this helped

4 0

3 years ago

Round to the ten millions place of the number 329,530,682

Zanzabum

Answer:round the million number

Step-by-step explanation:329,530,692

Round to 330,000,000

8 0

3 years ago

A timer is started and a few moments later a model airplane is launched from the ground. Its height (in feet) as a function of t

WITCHER [35]

The airplane reaches its maximum height of 81 feet in 12 seconds.

<h3>Behavior of curves</h3>

If y = $x^{2}$ , it means that the second derivate is 2 which is positive, then there is a minimum turning point.

If y = - $x^{2}$ , it means that the second derivative will be -2 which is negative, then there is a maximum turning point.

Analysis:

h(t) = - $(t - 12)^{2}$ + 81

By expanding,

h(t) = -( $t^{2}$ - 24t + 144) +81

h(t) = - $t^{2}$ + 24t - 144 + 81

h(t) = - $t^{2}$ + 24t - 63

at turning point d/dt(h(t)) = 0

d/dt (h(t)) = -2t +24

-2t +24 = 0

if we differentiate again, second derivative is -2 which is negative, so it is a maximum point.

2t = 24

t = 12 seconds

h(t) at t = 12

h(t) = $-(12)^{2}$ + 24(12) - 63 = 81 feet

In conclusion, the maximum height of the airplane after 12 seconds is 81 feet.

Learn more about minimum and maximum points: brainly.com/question/14993153

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7 0

2 years ago