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2 years ago

Which of the following expressions is true

Mathematics

1 answer:

4vir4ik [10]2 years ago

8 0

Answer:
B

Explanation:
When multiplying exponents, you add them together.

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Each salt shaker holds 1 1/4 ounces. If a box of salt contains 10 ounces, how many shakers will it fit

Alekssandra [29.7K]

8 shakers will fit becuase 4 shakers equal 5 ounces and you multiply it by two and you get 10

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2 years ago

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SELECT ALL THAT APPLY!!

ella [17]

Answer:

lines a and b

Step-by-step explanation:

A negative slope makes the line face leftward so that leaves a and b.

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2 years ago

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Question 6 (1.25 points)

Lisa [10]

Answer:

Test statistic Z= 1.713

The calculated Z- value = 1.7130 < 2.576 at 0.01 level of significance

Null hypothesis is accepted

There is no difference between the mean annual salary of all lawyers in a city is different from $110,000

Step-by-step explanation:

Step(i):-

A researcher wants to test if the mean annual salary of all lawyers in a city is

different from $110,000

Mean of the Population μ = $110,000

Sample size 'n' = 53

Mean of the sample x⁻ = $114,000.

standard deviation of the Population = $17,000,

Level of significance = 0.01

Null hypothesis :

There is no difference between the mean annual salary of all lawyers in a city is different from $110,000

H₀: x⁻ = μ

Alternative Hypothesis : x⁻ ≠ μ

Step(ii):-

Test statistic

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

$Z = \frac{114000-110000}{\frac{17000}{\sqrt{53} } }$

Z = 1.7130

Tabulated value Z = 2.576 at 0.01 level of significance

The calculated Z- value = 1.7130 < 2.576 at 0.01 level of significance

Null hypothesis is accepted

There is no difference between the mean annual salary of all lawyers in a city is different from $110,000

4 0

2 years ago

The radius of the bull’s-eye of the dartboard is 8 inches. The radius of each concentric circle is 8 inches more than the radius

UNO [17]

Answer with Step-by-step explanation:

The radius of the bull’s-eye of the dartboard is 8 inches.

The radius of each concentric circle is 8 inches more than the radius of the circle inside it.

Radius of first circle=8 in.

Radius of second circle=16 in.

Radius of third circle=24 in.

Radius of fourth circle=32 in.

Area of C=Area of the third circle-Area of second circle

= π×24×24-π×16×16

= 320π sq. in.

Total area of dartboard=Area of fourth circle=π×32×32

=1024π sq. in.

P( the dart will hit in area C)= area of c/total area of dart board

=320π/1024π

= 5/16

Hence, correct option is:

B.5/16

5 0

2 years ago

Solve the system of equations using elimination. SHOW WORK!!!!!!!!!!!!!

irinina [24]

q= 6

r= 7

work--

Multiply 1st column by -2:

-30q+8r=-124

5q+8r=86

Subtract 2nd column from the first column:

-35q= -210

Solve for q:

q=6

Subtract q=6 by any of the two equations, so:

-30q+8r=-124

-30*6+8r=-124

Solve for r:

r=7

8 0

2 years ago

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