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stellarik [79]
3 years ago
11

(3 − 13x − 7x2) − (5x2 + 12x − 10)

Mathematics
2 answers:
Brums [2.3K]3 years ago
5 0
113 is the answer hope i help u
goblinko [34]3 years ago
4 0

Answer:

- 12x^2 - 25x +13

Step-by-step explanation: (3 -13x -7x2)-(5x2 +12x -10)   multiply the entire second term by negative one

3 - 13x -7x^2 -5x^2 -12x +10   combine like terms

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I need help but I need the correct answer everyone is giving me the wrong answer !!
Jlenok [28]

Answer:

y - 2 = 6 (x - 1)

Step-by-step explanation:

Slope intercept form equations look like this:

y - y1 = m (x - x1)

***m = \frac{y2-y1}{x2-x1}

Using the point (1,2), we know that x1 = 1 and y1 = 2. Let's sub these values into the slope intercept equation:

y - 2 = m (x - 1)

To complete this equation, we need to find slope. Pick out another point on the graph and plug into the slope equation. We can use point (2,8), where (1,2) = Point 1 and (2,8) = Point 2.

\frac{y2-y1}{x2-x1}=\frac{8-2}{2-1} =\frac{6}{1} =6

Now that we know m = 6, let's plug that back into the original equation to get our final answer:

<u>y - 2 = 6 (x - 1)  </u>          

I hope this helps!

6 0
2 years ago
A circular city plaza is surrounded by a row of bricks. The area of the plaza is 1,520 square meters. How long is the row of bri
Korolek [52]

Answer:

138 meters

Step-by-step explanation:

step 1

Find the radius of the circular city plaza

The area is equal to

A=\pi r^{2}

we have

A=1,520\ m^2

\pi =3.14

substitute

1,520=(3.14)r^{2}

solve for r

r^2=1,520/3.14\\r=22\ m

step 2

we know that

To find out how long is the row of bricks, determine  the circumference of the circular city plaza

The circumference is equal to

C=2\pi r

we have

r=22\ m

\pi =3.14

substitute

C=2(3.14)(22)=138\ m

8 0
4 years ago
Andrea enjoys running. She keeps a daily journal to record how far she runs. She wears a pedometer to calculate the exact distan
natita [175]

I think this is just a simple addition problem to calculate the exact distance in kilometers.

So add 3.6+4.705+5.92=

14.225 kilometers that Andrea ran over the three days.

Hope this helps, have a good day. c;

3 0
4 years ago
Read 2 more answers
Can someone help me with this ?
AysviL [449]
Use pythagora's theorem to solve it
c^2=a^2+b^2
x^2=(3/4)^2+1^2
x^2=25/16
x= 5/4 = 1 1/4 inch
therefore it is B
5 0
3 years ago
Read 2 more answers
Two linear equations are shown.
mojhsa [17]

Answer: Option (2)

Step-by-step explanation:

Setting the equations equal to each other,

\frac{1}{3}x+2=\frac{4}{3}x-5\\\\7=x

If x=7, then y=\frac{7}{3}+2=\frac{13}{3}

3 0
2 years ago
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