Answer:
-11
Step-by-step explanation:
g(-5)=-5^2+8(-5) +4
=25+-40+4
=-11
sorry if you mind but why are you posting all questions here . where are you from
Answer:
see explanation
Step-by-step explanation:
let t be the cost of 1 t- shirt and s be the cost of 1 pair of shoes , then
4t + 3s = 325 → (1)
2t + 2s = 194 → (2)
(b) Solving by elimination
Multiplying (2) by - 2 and adding to (1) will eliminate t
- 4t - 4s = - 388 → (3)
Add (1) and (3) term by term to eliminate t
0 - s = - 63
- s = - 63 ( multiply both sides by - 1 )
s = 63
Substitute s = 63 into either of the 2 equations and solve for t
Substituting into (2)
2t + 2(63) = 194
2t + 126 = 194 ( subtract 126 from both sides )
2t = 68 ( divide both sides by 2 )
t = 34
Cost of pair of shoes = AED 63 and cost of t- shirt = AED 34
The answer would be H. You can immediately eliminate F and J because they do not include the $10 fee and $39 is the amount charged for one book.
The number of questions answered correctly = 90.
<h3>What is a system of linear equations?</h3>
- A system of linear equations is a set of two or more linear equations.
- Linear equations refer to the equations that involve two or more variables in the form of "ax + b".
Now,
Given:
- Total number of questions = 200
- Marks for correct answer = 4
- Marks for incorrect answer = -1
- Total marks = 250
To find : Number of correct answers = ?
Finding:
Now, assuming that the student attempted and answered all the questions,
- Let the number of questions correctly answered be x and incorrectly answered be y.
Then,
- x + y = 200 (For number of questions) (eqn 1)
- and 4x - y = 250 (For the marks scored) (eqn 2)
Solving the system of linear equations:
For eqn 2, we get that y = 4x - 250
Substituting in eqn 1, we get:
=> x + 4x - 250 = 200
=> 5x = 250 + 200 = 450
=> x = 90
That is, the number of questions answered correctly = 90, the incorrect answers = 200 - 90 = 110.
To learn more about system of linear equations, refer to the link: brainly.com/question/2226590
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