Please helpp with these 2 questions

Mathematics

1 answer:

Ivanshal [37]3 years ago

7 0

Answer:

answer=text

Step-by-step explanation:

copy the link

You might be interested in

Jeff bought 4 oranges and 7 apples for a total of $4.88. Gene bought 12 oranges and 8 apples for a total of $7.88. What is the c

rjkz [21]

4x+7y=4.88 -> mult by -3 -> -12x-21y=-14.64
12x+8y=7.88
-12x-21y=-14.64
Add the two above equations together, the y will be left:
-13y=-6.76
y=0.52 —> cost of each apple (plug back into one of original equations, I chose 4x+7y=4.88:
4x+7(0.52)=4.88
Solve for x.
x=0.31 —> cost of each orange

4 0

3 years ago

Madelyn conducted a scientific experiment. For a certain time, the temperature of a compound rose 33 degrees every 1 hours. How

REY [17]

33 degrees
If it rises 33 degrees per hour, in one hour it would raise by that much :)

4 0

3 years ago

Solve the equation below for the variable (x):

user100 [1]

Answer:

Hope this helps. If not let me know and I'll explain it better

3 0

3 years ago

Problem is in the pictures

marta [7]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}6x+3y=-21&\text{divide both sides by (-3)}\\2x+5y=5\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-y=7\\2x+5y=5\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=12\qquad\text{divide both sides by 4}\\.\qquad\qquad y=3\\\\\text{Put it to the second equation:}\\2x+5(3)=5\\2x+15=5\qquad\text{subtract 15 from both sides}\\2x=-10\qquad\text{divide both sides by 2}\\x=-5$