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klasskru [66]
2 years ago
9

Y = -x²+4 y = 2x+1 solve the system of equations

Mathematics
2 answers:
muminat2 years ago
7 0
X=1,−3
y=3,−5

y=2x+1
​


​
Semenov [28]2 years ago
4 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
1
,
3
)
,
(
−
3
,
−
5
)
(
1
,
3
)
,
(
-
3
,
-
5
)
Equation Form:
x
=
1
,
y
=
3
x
=
1
,
y
=
3
x
=
−
3
,
y
=
−
5
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Solve quadratic equation 10x^2+x-2=0
zhuklara [117]

Answer:

\{-\frac{1}{2} \} \cup \{\frac{2}{5}\}

Step-by-step explanation:

10x^2 + x - 2 = 0; \\ a = 10, b = 1, c = -2; \\ D = b^2 - 4ac = 1^2 - 4 * 10 * (-2) = 1 + 80 = 81 = 9^2, > 0; \\ x_{1, 2} = \frac{-b \pm \sqrt{D}}{2a} = \frac{-1 \pm \sqrt{9^2}}{2 * 10} = \frac{-1 \pm 9}{20} = \left \ [ {{\frac{-1 - 9}{20} = -\frac{10}{20} = -\frac{1}{2}  } \atop {\frac{-1 + 9}{20} = \frac{8}{20} = \frac{2}{5}}} \right.

8 0
2 years ago
The ratio of the sides of two similar regular octagons is 4:7. If the measure of each side of the larger octagon is 28 cm, then
Virty [35]

Answer:

16 cm.

Step-by-step explanation:

It is 4 times the ratio.

8 0
2 years ago
A car dealership sold 265 cars in 5 months. At what rate did the dealership sell cars in cars per month?
RideAnS [48]

Answer:

The dealership sold 53 cars per month.

Step-by-step explanation:

To solve this, simply divide 265 by 5 to find out how many cars were sold per month. If we do this, the answer is 53. The dealership sold 53 cars per month.

5 0
2 years ago
afer each soccer practice, scott runs 4 sprints of 20yards each. if he continues his routine how many practice will it take for
lilavasa [31]
The answer is that he will have to sprint 44 times in order for Scott to have sprinted 2 miles

7 0
3 years ago
Find f(2) for f(x)=3x2+9x−6
Naya [18.7K]

Answer:

a. f(2)=24  

Step-by-step explanation:

Given function:

f(x)=3x^2+9x-6

To find f(2)

Solution:

In order to find f(2),we need to plugin input=2 i.e. the value of x=2 in the function and find the output by evaluating.

Plugging in x=2 in the given function.

f(2)=3(2)^2+9(2)-6

Evaluating.

f(2)=3(4)+18-6

f(2)=12+18-6

∴ f(2)=24   (Answer)

3 0
3 years ago
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