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Ksenya-84 [330]
1 year ago
13

Example 2: Solve the system algebraically. Then check your answer graphically.

Mathematics
1 answer:
Harlamova29_29 [7]1 year ago
6 0

Answer: (-2, 1), (-4, -3)

Step-by-step explanation:

y = x² + 8x + 13

y = 2x+5

x² + 8x + 13 = 2x+5

x² + 6x + 13 = 5

x² + 6x + 8 = 0

x² + 2x + 4x + 8 = 0

(x+2)(x+4)=0

<u>x=-2 or x=-4</u>

y=2(-2)+5

y=-4+5

<u>y=1</u>

y=2(-4)+5

y=-8+5

<u>y=-3</u>

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Need help in this question
Anarel [89]

Answer:

B) 9

Step-by-step explanation:

110 + 75 + 11x - 9 + 8x + 13 = 360

19x + 189 = 360

19x (+ 189 - 189) = 360 - 189

19x = 171

19x/19 = 171/19

x = 9

3 0
2 years ago
Which numbers make the inequality true?
Fofino [41]

Answer:

D

Step-by-step explanation:

i had the same answer and got it right

6 0
3 years ago
Which situation is best represented by the equation? 35p + 129.50 = 479.50
Ksivusya [100]

Answer:

A

Step-by-step explanation:

this is because we don't know how many trainers she goes to, so the cost will be 35p. and then include the registration fees she pays.

5 0
2 years ago
1. One week Carlos bought 3 bags of Tabitha Tidbits and 4 bags of Figaro Flakes for $43.00. The next week he bought 3 bags of Ta
d1i1m1o1n [39]
Tabitha Tidbits costs $7 per bag, and Figaro Flakes is $5.50 per bag.
You need to set up a system of equations. Use "x" for Tabitha Tidbits and "y" for Figaro Flakes, and let the total cost of each trip equal c. Using the equation ax+by=c, substitute the cost of each trip in for c, and the number of bags for each food for a and b respectively. The two equations will be:
3x+4y=43
3x+6y=54
Isolate x in the first equation and you will get:
x=(43-4y)/3
Substitute the above equation for x into the other equation:
3*((43-4y)/3)+6y=54
Isolate y in this equation, and you will get 11/2, which is 5.5
So the cost of one bag of Figaro Flakes is $5.50
Now substitute this into the equation where you isolated x:
(43-4(5.5))/3
You will get x=7, so a bag of Tabitha Tidbits is $7
3 0
3 years ago
​how many meters is the circumference of a circle with a radius of 20 cm?
Harman [31]
First find the circumference of the circle.
Circumference: 2 \pi r

Plug in 20 for the radius (r).
2 \pi20 = 125.66 

The circumference of the circle is 125.66 cm.
Now to find this in meters... there are 100 centimeters in 1 meter.

Divide 125.66 by 100 to find how many meters this is.
125.66 ÷ 100 = 1.26

The circle's circumference is 1.26 meters.
4 0
3 years ago
Read 2 more answers
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