x= -14.5
Step-by-step explanation:
-1.3=x-(-13.2)
the two - signs cross eachother out, making it a +.
making the equation -1.3=x-(-13.2) turn into -1.3=x+13.2.
so you should automatically know your x is going to have to be negative.
What I did:
13.2+1.3=14.5,
but since the 1.3 was actually negative, (-1.3) the 14.5 will turn negative, making it -14.5
Answer:
6 pounds of fertilizer
Step-by-step explanation:
we know that
The directions say to use 4 pounds of fertilizer for 120 square feet of soil
so
using proportion
Find out how many pounds of fertilizer to use for 180 square feet of soil
Let
x ----> the number of pounds of fertilizer to use
Answer:
(a + b)(a² - ab + b²)
Step-by-step explanation:
a³ + b³ ← is a sum of cubes and factorises as
a³ + b³ = (a + b)(a² - ab + b²) ← equivalent expression
Complete question :
The Daily Info charges a fee $650 of plus $80 per week to run an ad. The People's Paper charges $145 per week. Write an inequality to represent the number of weeks an ad must run for the total cost at the Daily Info to be less expensive than the cost at the People's Paper. Let w be the number of weeks the ad runs in the paper
Answer:
650 + 80w < 145w
Step-by-step explanation:
Given that :
Number of weeks ad will run = w
Daily Info total cost :
650 + 80w
The People's Paper total cost:
145w
Number of weeks ad should run For cost at daily info to be less expensive than peoples choice';
Daily Info total cost < people's choice
650 + 80w < 145w
650 < 145w - 80w
650 < 65w
650/65 < 65w / 65
10 < w
w > 10
Answer:
2a. The length and width can be defined by the expressions (x-6) and (x+3).
2b. For x=12, length and width can be 6 units and 15 units. Area will be 6·15 = 90 units².
Step-by-step explanation:
2a. You have correctly factored the polynomial. You need to make use of those factors to answer the question asked. (Factoring is a means to get to the answer; the factoring is <em>not</em> the answer.)
2b. Again, you have to pay attention to the question(s) asked. Filling x=12 into the factors you found lets you use those to find the length and width asked for. You can evaluate the original polynomial to find the area (as you have), but you are asked to make use of the Part A results to do so. A number by itself doesn't answer a question that asks for three numbers.
For x=12,
... x - 6 = 6 . . . . length or width (in units)
... x + 3 = 15 . . . . width or length (in units)
... area = length·width = 6·15 = 90 . . . . units²