Mathematics: For questions 4-5, how many solutions does the system have? 4. -4y+4=x 2x+8y=8 a. one solution b. two solutions c. infinitely many solutions d. no solution 5. 6x+2=y 3y-18x=12 a. one solution b. two solutions c. infinitely many solutions d. no solution

For questions 4-5, how many solutions does the

Ответ:

BluSeaa

14.01.2022

$\large\boxed{Q4.\ C.\ \text{Infinitely Many Solutions}}\\\boxed{Q5.\ D.\ \text{No Solution}}$

Step-by-step explanation:

$Q4.\\\\\left\{\begin{array}{ccc}-4y+4=x&(1)\\2x+8y=8&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\2(-4y+4)+8y=8\qquad\text{divide both sides by 2}\\-4y+4+4y=4\qquad\text{combine like terms}\\4=4\qquad\bold{TRUE}\\\\\text{Infinitely Many Solutions}$

$Q5.\\\\\left\{\begin{array}{ccc}6x+2=y&(1)\\3y-18x=12&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\3(6x+2)-18x=12\qquad\text{divide both sides by 3}\\6x+2-6x=4\qquad\text{combine like terms}\\2=4\qquad\bold{FALSE}\\\\\text{No Solution}$

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Ответ:

ScienceSmartie

27.01.2020

Mathematics

35.2 and 8.8

Step-by-step explanation:

1. cyclist a travels 4 parts

2. cyclist b travels 1 part

3. cyclist a travels 176 kilometers

4. cyclist b travels 44 kilometers

5. rate of cyclist a is 35.2 km/hr

6. rate of cyclist b is 8.8 km/hr

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For questions 4-5, how many solutions does the system have?

4. -4y+4=x
2x+8y=8
a. one solution
b. two solutions
c. infinitely many solutions
d. no solution

5. 6x+2=y
3y-18x=12
a. one solution
b. two solutions
c. infinitely many solutions
d. no solution

Ответ:

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