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bixtya [17]
3 years ago
12

Solve and check: 3 x2 + 5x + 6 + x − 1 x + 2 = 7 x + 3

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
5 0

Answer:

3x^{2} -2x +5=0

Step-by-step explanation:

Combine liked terms:

3x^{2}+5x+x-1x+6+2=7x+3

3x^{2}+6x-1x+8=7x+3

3x^{2}+5x+8=7x+3

Subtract 3: 3x^{2}+5x+8-3=7x+3-3

3x^{2}+5x+5=7x

Now subtract 7x:

3x^{2}+5x+5-7x=7x-7x

If you want combine liked terms:

3x^{2}-7x+5x+5=0

3x^{2}-2x+5=0

Hope this helps!

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the money used in south Africa is is called the rand . the estrange rate 7 rand for $1. Find how many dollars you would receive
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Answer:

$3

Step-by-step explanation:

21 rand * ($1/7 rand) = $3

4 0
2 years ago
The cost of a catering prom is 250 plus $15 for each person attending. what is the cost of 150 people?
Anastasy [175]

Answer:

$2500

Step-by-step explanation:

First, multiply the $15 for the 150 people attending, to get 2250. Next, add the last $250 to get a total cost of $2500

Hopefully this helps- let me know if you have any questions!

4 0
3 years ago
Read 2 more answers
If a line contains the point (0, -1) and has a slope if 2, then which if the following points also lies on the line? (2, 1), (1,
Neko [114]
(1, 1) the slope is 2 and slopes can be read the easiest when expressed as a fraction (2/1) when the numerator (2) expresses how many digits you move the point up and the denominator (1) expresses how many points you move right
5 0
2 years ago
A parcel delivery service will deliver a package only if the length plus girth​ (distance around) does not exceed 84 inches. ​(A
Kisachek [45]

Answer:

A. 14x14x28

B. The maximum volume is 5488 cuibic inches

Step-by-step explanation:

The problem states that the box has square ends, so you can express volume with:

v=x^{2} y

Using the restriction stated in the problem to get another equation you can substitute in the one above:

4x+y=84\\\\

Substituting <em>y</em> whit this equation gives:

v=x^{2} (84-4x)\\\\v=84x^{2} -4x^{3}

Now find the limit of <em>x</em>:

\frac{84x^{2}-4x^{3}}{dx}=168x-12x^{2}\\\\x=\frac{168}{12}=14

Find the length:

y=84-4(14)=28

You can now calculate the maximum volume:

v=(14)^{2}(28)= 5488

6 0
3 years ago
Why is the rise the value for the numerator and the run the value for the denominator?
julsineya [31]
Because change in y for the rise is if it goes up or down and change in x for the run to see if it goes left or right
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