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Yuliya22 [10]
3 years ago
11

Shirts cost $9.00 each. There is a 9% sales tax. If Mrs. Meagher buys three shirts, how

Mathematics
1 answer:
BARSIC [14]3 years ago
8 0

Answer: $29.43

Step-by-step explanation: 3 shirts for $9 each adds up to $27. 9%= 0.09 so you can multiply the cost of the shirts by 1.09 because that is the base price plus the sales tax. Then you get $29.43.

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-8 over -2 by the power of three Minus 3 times -2 times 4
Crazy boy [7]

Answer:88


Step-by-step explanation:

You can simplify -8/-2 its 4 then take 4 to the 3rd power and you'll get 64 the take 3×-2 and you'll get -6 then multiply -6×4 and you'll get -24 then subtract 64 - (-24) which would end up being plus a positive and you'll get 88

4 0
3 years ago
4 more than twice a number is -10
timama [110]

Answer:

The number is -3

Step-by-step explanation:

Write an equation

2x+4=-10

add 4 on both sides

2x=-6

divide 2 on both sides to isolate variable

x=-3

3 0
2 years ago
Deep mixing is a ground improvement method developed for soft soils like​ clay, silt, and peat. Civil engineers investigated the
Kitty [74]

Answer:

a)  0.9078

b) 0.9832

c) T = 2.9867

Step-by-step explanation:

Given:-

T  ~ N (2.7 , 0.8 )

Find:

Find the probability that the tip resistance will fall between 1.3 and 4.0 MPa.

Find the probability that the tip resistance will exceed 1.0 MPa.

Find a value of tip​ resistance, T, such that 36​% of all soil samples have tip resistance values that exceed T

Solution:

a) To find the P ( 1.3 < x < 4.0 ) we will first compute the z-score values:

        P (1.3 < x < 4.0 ) = P ( (1.3 - 2.7)/0.8 < Z < (4.0 - 2.7)/0.8)

        P (1.3 < x < 4.0 ) = P ( -1.75 < Z < 1.625)

- Using the Z-table values we can evaluate the probability:

       P (1.3 < x < 4.0 ) = P ( -1.75 < Z < 1.625) = 0.9078

b) To find the P ( x > 1 ) we will first compute the z-score values:

        P ( x > 1.0 ) = P ( Z > (1.0 - 2.7)/0.8)

        P ( x > 1.0 ) = P ( Z > -2.125)

- Using the Z-table values we can evaluate the probability:

       P ( x > 1.0 ) = P ( Z > -2.125) = 0.9832

c) To find the P ( x > T ) we will first compute the z-score values:

       P ( x > T ) = P ( Z > (T - 2.7)/0.8) = 0.36

  - We will search for the z value with the condition above from Z-table.

       P ( Z > (T - 2.7)/0.8) = 0.36,  Z = 0.358375

  - Hence, we calculate for T:

        T = 0.358375*0.8 + 2.7

        T = 2.9867

5 0
3 years ago
At the beginning of the month, Sheryl had a balance of $120 in her checking account. She then made a purchase for $80, using her
Rama09 [41]
$80

add what you took out
3 0
2 years ago
A social scientist wishes to conduct a survey. She plans to ask a yes/no question to a random sample from the U.S. adult populat
agasfer [191]

Answer:

The sample proportion from the sample of 900 is more likely to be close to the true population proportion, p.

Step-by-step explanation:

for the first one

6 0
3 years ago
Read 2 more answers
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