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PIT_PIT [208]
3 years ago
15

Evaluate [x+y] for x=8 and y=-15

Mathematics
2 answers:
lesya692 [45]3 years ago
8 0
X+Y =?

X=8
Y=(-15)

8+(-15)=
8-15= -7
ladessa [460]3 years ago
4 0
8+-15=-7

Substitute the x for 8, and the y for -15 and you add it together. Presto!
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Find the value of x and simplify completely
kondaur [170]
The value would be more than c
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3 years ago
Which graph shows y=x^2+3x-4
Ivahew [28]

Answer:

Third graph in the photo

Step-by-step explanation:

x^2+3x-4 can be factored as (x+4)(x-1). When y=0, x must be -4 or 1 to satisfy the equations, and thus the roots of the graph are at x=-4 and x=1. When x=0, y=(4)(-1)=-4. The only graph that satisfies both of these requirements is the third/last one.

3 0
2 years ago
Which values of P and Q result in an equation with no solutions?
Ad libitum [116K]

Try this solution/explanation:

<u>way 1</u>:

rule: for an equation where no roots P+Q=0. It means, Px-Qx=0, ⇔ x(P-Q)=0, ⇔ P=Q.

for answer 'D' P=Q=15.

<u>way 2</u>:

rule: if an equation of the line has a form y=kx+b, then y₁||y₂ if k₁=k₂. It means, for y₁=Px-45 || y₂=Qx+75, then P=Q. P=Q, if 'D' answer.

Answer: D

3 0
2 years ago
What is the first step in isolating the variable in this equation?
VLD [36.1K]
It’s either subtract 75 from both sides or divide both sides by 1/2 but I’m pretty sure it’s subtract 75 from both sides
6 0
2 years ago
Read 2 more answers
a 55 ft long drainage pipe must be cut into two pieces before installation. one piece is two-thirds as long as the other. find t
Hunter-Best [27]

Answer:

33 feet

22 feet

Step-by-step explanation:

Let the longer piece be x

Therefore the shorter piece is (2/3)x

x + (2/3)x  = 55                  Combine the left 2 terms.

(3/3)x + (2/3)x = 55           Add  

(5/3)x = 55                        Multiply both sides by (3/5)

(3/5) * (5/3)x = (3/5)*55

x = 33

The larger piece is 33 feet

The smaller piece is (2/3) * 33 = 22 feet

5 0
3 years ago
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