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2 years ago

Today, everything at a store is on sale. The store offers a 30% discount. The sale price of a hat is $21.00. What

Mathematics

1 answer:

Pavlova-9 [17]2 years ago

5 0

Answer:

Step-by-step explanation:

Because 2100 divided by 30 is 70 I hope this is the answer :)

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Jasmine evaluated the expression 3x+2 when x=5.

Inessa05 [86]

Answer:

when x = 5

then the value of. (3x+2)

(3*5) + 2

 

15 + 2

=. 17

her mistake was that she doesn't multiplied 5 and 3 

6 0

3 years ago

Jade is painting a rectangular wall. The wall is 414 yd long and 223 yd high. The formula for the area of a rectangle is A=bh. W

anyanavicka [17]

So remember that (a/b)(c/d)=(ac)/(bd)

convert to imporoper number for easy

4 and 1/4=4+1/4=16/4+1/4=17/4

2 and 2/3=2+2/3=6/3+2/3=8/3

length times base=17/4 times 8/3=
(17 times 8)/(4 times 3)=
136/12=
34/3=
33/3+1/3=
10+1/3=
10 and 1/3 square yards

area is 10 and 1/3 square yards

4 0

3 years ago

Read 2 more answers

What is (4x+2)^2-3 ??

Veronika [31]

(4x+2)²-3
16x²+4-3
16x²+1

Hope this helps :)

4 0

3 years ago

The Empire State Building is just over 1,450 feet tall. In anticipation of visiting this landmark on your vacation, you create a

vfiekz [6]

Answer:

Step-by-step explanation:

Use math-way go quick and easy answers without step by step explanations, and use math-soup-calculator for step by step explanation

3 0

3 years ago

A researcher wants to study the average miles run per day for marathon runners. In testing the hypotheses: H0: μ = 25 miles vs.

masya89 [10]

Answer:

The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance

Null hypothesis is accepted

Alternative hypothesis is rejected

A researcher wants to study the average miles run per day for marathon runners is 25

Step-by-step explanation:

Step(i):-

Given sample size 'n' = 36

Given mean of the sample x⁻ = 22.8 miles

Given mean of the Population 'μ' = 25

Given standard deviation of the Population 'σ' = 10

Null hypothesis:-H₀: μ = 25

Alternative Hypothesis:H₁:μ ≠ 25

Level of significance = 3 % or 97%

The critical value Z₀.₉₇ = 1.881

Step(ii):-

Test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{22.8 - 25}{\frac{10}{\sqrt{36} } }$

Z = -1.325

|Z| = |-1.325| = 1.325

The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance

Null hypothesis is accepted

Alternative hypothesis is rejected

conclusion:-

A researcher wants to study the average miles run per day for marathon runners is 25

6 0

2 years ago