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3 years ago

What is the solution to the following system of equations: 2x + 3y = 5 AND 5x = 5y -25

Mathematics

2 answers:

N76 [4]3 years ago

3 0

Answer:

point form (-2,3)

Equation form

x=-2, y=3

Step-by-step explanation:

solve for the first variable in one of the equation, then substitute the result into the other equation.

Brrunno [24]3 years ago

3 0

Answer:

(-2,3)

Step-by-step explanation:

5x=5y-25

x=y-5 divide both sides by 5

use substitution.

2(y-5)+3y=5

2y-10+3y=5 distribute the parenthesis

5y-10=5 combine like terms

5y=15 add 10 to both sides

y=3 divide both sides by 5 to get y alone

5x=5(3)-25 replace y with 3, the value we found above

5x=15-25 multiply 5 and 3

5x=-10 subtract 25 from 15

x=-2 divide both sides by 5 to get x alone

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Alguien me podría ayudar con esos problemas? :D

riadik2000 [5.3K]

Answer:

3. $\frac{1}{12}$

4. $\frac{22}{3}$

5. $\frac{5}{42}$

8. $\frac{8}{63}$

9. $-\frac{7}{54}$

10. $-\frac{3}{16}$

Step-by-step explanation:

$\frac{-6}{8} *\frac{1}{-9} =\frac{-6}{-72}$

ahora simplifica, un numero negativo dividido por otro numero negativo se convierte en positivo. Los dos nu$meros se pueden simplificar por 6

$\frac{1}{12}$

$\frac{11}{3}*\frac{4}{2} =\frac{44}{6}$

ahora simplifica, los dos nu$meros se pueden simplificar por 2

$\frac{22}{3}$

$\frac{5}{-3}*\frac{-2}{7}* \frac{1}{4} =\frac{-10}{-84}$

ahora simplifica, un numero negativo dividido por otro numero negativo se convierte en positivo. Los dos nu$meros se pueden simplificar por 2

$\frac{5}{42}$

$\frac{20}{-5}*\frac{1}{-9}* \frac{-2}{-7} =\frac{-40}{-315}$

ahora simplifica, un numero multiplicado por otro negativo se convierte en positivo. Un numero negativo dividido por otro numero negativo se convierte en positivo. Los dos nu$meros se pueden simplificar por 5

$\frac{8}{63}$

$\frac{2}{3}*\frac{-7}{-9}* \frac{-1}{4} =\frac{14}{-108}$

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$-\frac{7}{54}$

10.

$\frac{9}{-12}*\frac{-4}{16} =\frac{-36}{-192}$

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$-\frac{3}{16}$

Espero y te ayude esto! (:

5 0

3 years ago

Which shows the correct substitution of the values a, b, and c from the equation 0 = – 3x2 – 2x + 6 into the quadratic formula?

Stella [2.4K]

Answer:

x = StartFraction negative (negative 2) plus or minus StartRoot (negative 2) squared minus 4 (negative 3)(6) EndRoot Over 2(negative 3) EndFraction

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$0=-3x^{2}-2x+6$

$a=-3\\b=-2\\c=6$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(-3)(6)}} {2(-3)}$

therefore

x = StartFraction negative (negative 2) plus or minus StartRoot (negative 2) squared minus 4 (negative 3)(6) EndRoot Over 2(negative 3) EndFraction

4 0

3 years ago

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ILL GIVE BRAINLIEST I PROMISE HELP ME GOD HELP PLEASE PLEASE I BEG OF YOU PLEASE PELASE PLEASE OH MY GOD

Alexus [3.1K]

Answer:

I think it's J

Step-by-step explanation:

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3 years ago

Katenka cross country skied a trail that was 3/4 mile each way. after skiing 2/3 of the trail she turned around. What fraction o

allsm [11]

We know that

[total trail]=(3/4)*2------> 6/4---------> (3/2) miles

<span>[fraction of a mile that katenka did]=(2/3)*(3/2)------> 1 mile

the answer is 1 mile</span>

3 0

3 years ago

A flagpole casts a shadow 15 feet long. Brad is 6 feet tall. If Brad casts a 4.5ft shadow, how tall is the flag pole?

hram777 [196]

Answer:

11.25

Step-by-step explanation:

9/12 of 15 is 11.25

7 0

3 years ago