3 years ago

Find the measure of the indicated angle.

Mathematics

1 answer:

Nady [450]3 years ago

7 0

Answer:

X=4

Step-by-step explanation:

30x+5=31x+1

x=4

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What is the distance between -4/3 and 1/3

Artist 52 [7]

Answer:

5/3

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

If 30 is increased by 20%, what is the new amount?

Burka [1]

Answer:

The new amount is 36

Step-by-step explanation:

we know that

100%+20%=120%

Let

x-----> the new amount

The number 30 represent the 100%

by proportion

30/100%=x/120%

x=120*30/100=36

8 0

3 years ago

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s

Umnica [9.8K]

Answer:

88.51 is the minimum score needed to receive a grade of A.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 11

We are given that the distribution of exam grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.0793.

$P( X \geq x) = P( z \geq \displaystyle\frac{x - 73}{11})=0.0793$

$= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793$

$=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.410) = 0.9207$

$\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51$

Hence, 88.51 is the minimum score needed to receive a grade of A.

3 0

3 years ago

A rectangular athletic field is twice long as it is wide the perimeter is 90 yard dismention?

Shkiper50 [21]

Ah well this would look like 2(30) + 30 = 90 aka 2L + W = 90

5 0

3 years ago

Find the surface area of regular prism with height 6 cm, if the base of the prism is a Regular quadrilateral with side 4 cm.

marshall27 [118]

A "regular quadrilateral" is a square, so the length and width are both 4 cm. The surface area of a rectangular prism is given by
S = 2(LW +H(L +W))
S = 2((4 cm)*(4 cm) +(6 cm)*(4 cm +4 cm))
S = 2(16 cm² +48 cm²)
S = 2*64 cm² = 128 cm²

The surface area of the prism is 128 cm².

6 0

3 years ago