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3 years ago

How can you tell that x2 - 19x + 90 is not a perfect square trinomial?

Mathematics

1 answer:

Nimfa-mama [501]3 years ago

6 0

Because 19 is a prime number

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Is 5/18 a rational number ?

pentagon [3]

Answer:

5/18 is a rational number because a rational number is any integer,fraction terminating decimal,or repeating decimal.

4 0

3 years ago

R - 9S = 2 3R - 3S = -10

GrogVix [38]

R-9s=2 add 9s to both sides

r=2+9s making 3r-3s=-10 become:

3(2+9s)-3s=-10 perform indicated multiplication on left side

6+27s-3s=-10 combine like terms on left side

6+24s=-10 subtract 6 from both sides

24s=-16 divide both sides by 24

s=-16/24

s=-2/3, making r-9s=2 become:

r-9(-2/3)=2 perform indicated multiplication on left side

r+6=2 subtract 6 from both sides

r=-4

So s= -2/3 and r= -4

8 0

3 years ago

Country Club Activities At the Avonlea Country Club, 67% of the members play bridge and swim, and 86% play bridge. If a member i

Volgvan

Answer: 0.78

Step-by-step explanation:

Given : P(bridge and swim) = 0.67

P(bridge)= 0.86

Formula for conditional probability :

$P(B|A)=\dfrac{P(\text{A and B})}{P(A)}$

So, $\text{P(swim }|\text{ bridge) = }\dfrac{\text{ P(bridge and swim)}}{\text{P(bridge)}}$

$=\dfrac{0.67}{0.86}\approx0.78$

Hence, the probability that the member swims, given that the member plays bridge = 0.78

3 0

3 years ago

an open box with a square base have a volume of 8m^3. the material of the base costs $8 per square meter and the material for th

max2010maxim [7]

(Refer to picture for diagram.)

Area of base $=w^{2}$
Area of one side $=\frac{8}{w^{2}}*w=\frac{8}{w}$

Cost of base material $=8w^{2}$
Cost of material for a side $=6*\frac{8}{w}=\frac{48}{w}$
There are 4 sides so $4*\frac{48}{w}=\frac{192}{w}$

Total cost $C(w)=8w^{2}+\frac{192}{w}$

3 0

3 years ago

Due in 5 minutes please hurry

nlexa [21]

Answer:

69 ._.

Step-by-step explanation:

3 0

3 years ago