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Ierofanga [76]
4 years ago
5

It is in the attachment topic is 7th grade mathematics.

Mathematics
1 answer:
valkas [14]4 years ago
7 0

Answer:

Based on the ratio, she answered 9/30 incorrect. Therefore, she answered 21/30 correct.


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Is -2.54 greater or less than -2 and 27/50
zloy xaker [14]
-2.54 is equal to -2 27/50
7 0
3 years ago
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A belt runs a pulley of radius 8 inches at 60 revolutions per minute. a) Find the angular speed in radians per minute. b) Find t
Evgesh-ka [11]

Answer:

Part a) 120\pi\ \frac{rad}{min}

Part b) 960\pi\ \frac{in}{min}

Step-by-step explanation:

we have

60 rev/min

Part a) Find the angular speed in radians per minute

we know that

One revolution represent 2π radians (complete circle)

so

1\ rev=2\pi \ rad

To convert rev to rad, multiply by 2π

60\ \frac{rev}{min}=60(2\pi)=120\pi\ \frac{rad}{min}

Part b) Find the linear speed in inches per minute

we know that

The circumference of a circle is equal to

C=2\pi r

we have

r=8\ in ----> given problem

substitute

C=2\pi(8)

C=16\pi\ in

Remember that

One revolution subtends a length equal to the circumference of the circle

so

1\ rev=16\pi\ in

To convert rev to in, multiply by 16π

60\ \frac{rev}{min}=60(16\pi)=960\pi\ \frac{in}{min}

8 0
3 years ago
Yellow birds flight path can be modeled by the quadratic equation y= - 2^x + 14x - 24.
Fudgin [204]

\large{|\underline{\mathtt{\red{a}\blue{x}\orange{i}\pink{s}\blue{ \: }\purple{of}\green{ \: }\red{sy}\blue{mm}\orange{etry}}}}

\large \sf \: x =  \frac{7}{2}

\large{|\underline{\mathtt{\red{m}\blue{a}\orange{x}\pink{i}\blue{m}\purple{u}\green{m}\red{ \: }\blue{v}  \red{a}  \pink{l} \purple{u}\orange{e}}}}

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4 0
3 years ago
Which of the following is true?
VARVARA [1.3K]

Answer:

The correct option is c which is if this test was one-tailed instead of two-tailed, you would reject the null.

Step-by-step explanation:

a: This statement cannot be true as the p-value for a 1 tailed test is dependent on the level of significance and other features.

b: This statement cannot be true as there is no valid mathematical correlation between the p-value of the one-tailed test and the current p-value.

c: This statement is true because due to the enhanced level of significance, the null hypothesis will not be rejected.

d: This statement is inverse of statement c which cannot be true.

e: The statement cannot be true as there is no correlation between the current p-value and the p-value of 1 tailed test. The correlation exists between the values of one-tailed and two-tailed p-values.

8 0
3 years ago
What is the value of b?<br><br><br><br> −7.5(x−3)=3.75
KengaRu [80]
I am assuming x is the same thing as b.
−7.5(x−3)=3.75
-7.5x+22.5=3.75
-7.5x=-18.75
x=2.5
3 0
3 years ago
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