Answer:the company bought 12 computers and 4 printers.
Step-by-step explanation:
Let x represent the number of computers that the company bought.
Let y represent the number of printers that the company bought.
The company buys a total of 16 machines. It means that
x + y = 16
Each computer costs $550 and each printer costs $390. If the company spends $8160 for all the computers and printers that was bought, it means that
550x + 390y = 8160 - - - - - - - - - - 1
Substituting x = 16 - y into equation 1, it becomes
550(16 - y) + 390y = 8160
8800 - 550y + 390y = 8160
- 550y + 390y = 8160 - 8800
- 160y = - 640
y = - 640/ - 160
y = 4
Substituting y = 4 into x = 16 - y, it becomes
x = 16 - 4
x = 12
Answer:
.70 8.40 divided by 12 because a dozen is equal to 12
Answer:
4x-8
Step-by-step explanation:
4(x-2)
4*x
4x
4 in to -2
8
you keep the sign the same so your equation should look like this
4x-8
Answer:CPCT stands for Corresponding Parts of Congruent Triangles which is used to compare the corresponding parts of two congruent triangles to find out the relationship between the parts of the two triangles. ... If AC≅DF, AB≅DE, and BC≅EF, then triangles ABC and DEF are congruent by the SSS postulate. I HOPE THIS HELPS
Answer:
Approx. 59% increase.
Step-by-step explanation:
Today - 221
Yesterday - 139
difference (today - yesterday) = 82
How to find percent:
((part)/(whole)) = ((x)/(100))
In this case, the part is the difference, and the whole is the value of an item yesterday, so the equation is:
82/139 = x/100
cross multiply
8200 = 139x
Inverse operations
8200 = 139x
/139 /139
8200/139 = x
approx. 59 = x
