Answer:
40 miles per hour
Step-by-step explanation:
Answer:
A box = $11
Step-by-step explanation:
Given
Represent the first order with A and the second with B.
So, we have:
Solving (a): Find B.
To find B, we make use of:
Make B the subject
Substitute values for Total and A
Open bracket
Collect Like Terms
Solving (b): Cost of a box of light bulb
This means that:
Substitute 7x + 13 for Total
Collect Like Terms
Make x the subject
Answer:
x = 8
y = -7
Step-by-step explanation:
This is a system of equations called simultaneous equations. We shall solve it by elimination method Step 1We shall label the equations (1) and (2)−3y−4x=−11.....(1)3y−5x=−61......(2)Step 2Multiply each term in equation (1) by 1 to give equation (3)1(-3y-4x=-11).....(1)-3y-4x=-11....(3)Step 3Multiply each term in equation 2 by -1 to give equation (4)-1(3y−5x=−61)......(2)-3y+5x=61.....(4)Step 4-3y-4x=-11....(3)-3y+5x=61.....(4)Subtract each term in equation (3) from each term in equation (4)-3y-(-3y)+5x-(-4x)=61-(-11)-3y+3y+5x+4x=61+110+9x=729x=72Step 5Divide both sides of the equation by 9, the coefficient of the unknown variable x to find the value of x 9x/9 = 72/9x = 8Step 6Put in x = 8 into equation (2)3y−5x=−61......(2)3y-5(8)=-613y-40=-61Collect like terms by adding 40 to both sides of the equation 3y-40+40=-61+403y=-21Divide both sides by 3, the coefficient of y to find the value of y 3y/3=-21/3y=-7Therefore, the values of x and y that satisfy the equations are 8 and -7 respectively
Answer:
IJ=JG= 20
J1=J2= 90°
HJ= HJ
SO:
HI= HG
s= 3s-54
2s= 54
(s= 27)
please mark brainliest ♡♡
