MATHEMATICS HIGH SCHOOL

4x + 5y = 19 , 5y - 4x = 38​

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

Adding both equations

4x+5y+5y-4x=19+38

10y = 57

y= 5.7

Subtracting equation i from ii

5y-4x-4x-5y=38-19

-8x=9

x= -0.9

Related Questions

The junior class has 50 students. Twenty-five students take only French, 15 take only Latin, and 10 take both. If a student is chosen at random from the class, what is the probability that the student chosen takes either French only or Latin only? 1/2 4/5 1
How do I find the slope​
Triangle D F G is shown. The length of D F is 11, the length of F G is 6, and the length of D G is 9. Heron’s formula: Area = StartRoot s (s minus a) (s minus b) (s minus c) EndRoot What is the area of triangle DFG? Round to the nearest whole square unit. 27 square units 38 square units 364 square units 728 square units
Which best explains why the equation 4x+5=4×-1 has no solution
Adam, Beth, and Carly walked a total of 10 miles collectively. Beth walked twice as far as Adam, and she walked a half a mile further than Carly. If a = number of miles Adam walks, b = number of miles Beth walks, and c = number of miles Carly walks, which equation is NOT true for this situation?A) b = 2a B) b = c + 0.5 C) 3a + c = 10 D) a + 2c = 10.5

Solve for x.

−10<−2x+4≤8

Answers

-10 < -2x+4\leq8\ \ \ \ |-4\n\n-14 < -2x\leq4\ \ \ \ |\text{change the signs}\n\n14 > 2x\geq-4\ \ \ \ |:2\n\n\boxed{7 > x\geq-2}\to\boxed{-2\leq x < 7}

Monica’s school band held a car wash to raise money for a trip to a parade in New York City. After washing 125 cars, they made $775 from a combination of $5.00 quick washes and $8.00 premium washes.This system of equations models the situation.

x + y =125

5x + 8y = 775

Solve the system to answer the questions.

How many premium car washes were ordered?

premium car washes



How many quick car washes were ordered?

quick car washes

Answers

Answer:

50 and 75

Step-by-step explanation:

trust me bro

Answer:

50 and 75

Step-by-step explanation:

Hope this helps :)

kelli calls her grandmother every month.Every other month,kelli also calls her cousin.if kelli calls her cousin in january,how many calls kelli have made to her grandmother and her cousin by the end of august.?

Answers

August is the 8th month
This means Kelli has called her grandmother 8 times
As she calls her cousin every other month and starts in January, this means she calls in January, March, May and July- 4 times.
Therefore, 8+4=12
Kelli has made 12 calls so far
Hope this helps :) 

John can service a television and a cable box in one hour. It took him four hours yesterday to service two televisions and ten cable boxes. How many minutes does John need to service a cable box?

Answers

For this item, we let x be the number of minutes he can service a television and y be the minutes he can service a cable box. Then, the system of linear equation that would best represent the given above is,
                                x + y = 60 
                                2x + 10 y = (4)(60)
The values of x and y from the equations are 45 and 15 minutes, respectively. Therefore, John needs 15 minutes to service a cable box. 

What is the equation of the line that passes through (-1, -7) and has a slope of 2?

Answers

Answer:

y=2x + 5 I think it should be

Which choice is equivalent to the expression below?√12-√27+√75

A.21√3
B.9√3
C.5√3
D.4√3

Answers

√(12) - √(27) + √(75) = √(4*3) - √(9*3) + √(25*3) = \n\n=2√( 3) -3√( 3) + 5√( 3) = 4 \sqrt3}

Answer : \ \ D. \ \ 4 √(3)
√(12)-√(27)+√(75)=√(4\cdot3)-√(9\cdot3)+√(25\cdot3)\n\n=\sqrt4\cdot\sqrt3-\sqrt9\cdot\sqrt3+√(25)\cdot\sqrt3=2\sqrt3-3\sqrt3+5\sqrt3=4\sqrt3\n\nAnswer:D.
Other Questions
I need help on this question
Which inequality best represents that ice cream at −5°C is cooler than ice cream at 4°C?−4°C > 5°C −4°C < 5°C 4°C < −5°C 4°C > −5°C
Write an equation of the line passing through points (3,8) and (-2,-22)
G(n) = 1 + 3h(n) = -n -1Find: (g/h)(-5)