Answer:
Isosceles
Step-by-step explanation:
Graph your triangle!
Then, do the distance formula. So from T to I is 5 units, R to I is 5 units, and T to R is 6 units. As two side lengths are congruent, the triangle is isosceles.
Hope this helps!
Answer:
y=3/4x-9
Step-by-step explanation:
isolate the y
4y=3x-36
divide by 4 to get y by itself
y=3/4x-9
put this equation into a graphing calculator if you do not know how to graph on your own without it. good luck
2% i think hopefully it's right
Answer:
f(x)=10x+30
Step-by-step explanation x=0=30 x= 1=40 x= 2=50 x= 3=60 x=4=70 x= 5=80 x=6=90 x= 7=100
Answer:
Step-by-step explanation:
Let x be the random variable representing the algebra test scores of the students. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,
z = (x - µ)/σ
Where
x = sample mean
µ = population mean
σ = standard deviation
From the information given,
µ = 81.5
σ = 5.1
the probability that a student scores below 76.4 is expressed as
P(x ≤ 76.4)
For x = 76.4
z = (76.4 - 81.5)/5.1 = - 1
Looking at the normal distribution table, the probability corresponding to the z score is 0.023
For x = 8
z = (8 - 6)/1 = 2
Looking at the normal distribution table, the probability corresponding to the z score is 0.159
Therefore, the number of students that scored below 76.4 is
0.159 × 130 = 21 students
