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tankabanditka [31]
3 years ago
10

Solve each system by graphing 7x-y=3 x-y=-3

Mathematics
1 answer:
Rudiy273 years ago
4 0
Here ya go... hope this helps (:

these are separate functions right? if not i'll do it again.

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20 POINTS PLUS BRAINLIEST ANDWER PLUS MY HOVER HOARD IM V DESPERATE HERE!!! Evaluate the polynomial for x=-2 in the equation -3x
Nadya [2.5K]

Answer:

65

Step-by-step explanation:

-3x^3 + 7x^2 -7x-1

Let x = -2

-3(-2)^3 +7(-2)^2 -7(-2) -1

According to PEMDAS, Powers first

-3(-8) +7(4) +14 -1

Then multiply

24 +28 +14-1

Then add and subtract

65

4 0
3 years ago
Nathaniel can weld a railing in 75 minutes. Brenda can weld a railing 25 minutes faster. If they work together, how many minutes
geniusboy [140]

Answer:

30 minutes

Step-by-step explanation:

Nathaniel can weld 1 rail in 75 minutes, so he welds 1R = 75 min,  and Brenda can weld 1 rail in 50 minutes (25 minutes faster than Nathaniel), so she welds

1R = 50 min

We want to see how many minutes it takes them both, so we need to solve both problems for the minute unit

Nathaniel:  (1/75)R = 1 min   (he can do one seventy-fifth of a rail per minute)

Brenda:  (1/50)R = 1 min (she can do one fiftieth of a rail per minute)

notice, the equation is 1/(minutes it takes them), and we want to see how long it takes both of them, so we get the equation:

1/75 + 1/50 = 1/x

Simplify the left side with common denominator of 57(50) = 3750

We get

125/3750 = 1/x

We can cross multiply to get rid of the fractions...

125x = 3750

Divide both sides by 125 to solve for x...

x = 30, so it would take them 30 minutes to weld a rail if they work together.

5 0
3 years ago
There are 20 light bulbs in 5 packages.Complete the table to find the rate that gives you the number of light bulbs in 3 package
blondinia [14]
Given that t<span>here are 20 light bulbs in 5 packages.

The table to find the rate that gives you the number of light bulbs in 3 packages is given as follows:

\begin{tabular}&#10;{|c|c|c|c|c|c|}&#10;Light bulbs&4&8&12&16&20\\[1ex]&#10;Packages&1&2&3&4&5&#10;\end{tabular}

Three different ways in which the rate can be written are:

12 light bulbs to 3 packages

12 light bulbs : 3 packages

12 light bulbs / 3 packages
</span>
7 0
3 years ago
I NEED HELP NOW PLEASE!
lapo4ka [179]

Answer:

The slope of the line is y = 1.8x

4 0
3 years ago
Read 2 more answers
A manufacturing process is designed to produce bolts with a 0.25-in. diameter. Once each day, a random sample of 36 bolts is sel
Troyanec [42]

Answer:

0.6170

Step-by-step explanation:

Given that a manufacturing process is designed to produce bolts with a 0.25-in. diameter.

i.e. no of bolts which are produced as per standard is X means then

X is normal with mean = 0.250 and std dev = 0.04

No of bolts tested = 36

If this mean falls outside the interval (0.230,0.270) the production would be shut down.

i.e. P(|x-25|>0.20) =production shut down probability

P(|x-25|>0.20)\\=P(|Z|>0.5)\\=2(0.5-0.1915)\\= 0.6170

3 0
3 years ago
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