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Ugo [173]
4 years ago
10

Phred has already graded 40 papers and he still needs to grade more. Write an equation for how many papers he is grading if he c

ontinues to grade 4 papers a minute.
Mathematics
1 answer:
vladimir2022 [97]4 years ago
5 0

y=4x+40

x represents the number of minutes

y is the total

40 because he already graded 40 papers, and 4x because that's how many phred grades times the number of minutes

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What is the answer to the pic​
MA_775_DIABLO [31]

Answer:

7

Step-by-step explanation:

\frac{7^{-1}}{7^{-2}}

7^{-1-(-2)}

7^{-1+2}

7^{1}

7

I used the following rules:

\frac{a^m}{a^n}=a^{m-n}

a^1=a

a \neq 0

6 0
3 years ago
Solve for x<br>A:10 B:14.5 C:20 D:6÷3​
den301095 [7]

By applying Cathetus theorem, the value of x is equal to 10 units.

<h3>How to determine the value of x?</h3>

In order to determine the value of x, we would apply Cathetus theorem (leg rule), which states that each leg of a right-angled triangle is the geometric mean that's directly proportional between the hypotenuse and the part of the hypotenuse that's directly below the leg.

In this context, we have:

x² = m × a

x² = (21 + 4) × 4

x² = 25 × 4

x² = 100

x = √100

x = 10 units.

Read more on Cathetus theorem here: brainly.com/question/11357448

#SPJ1

7 0
2 years ago
Goodmorning all help me guys​
kotegsom [21]

Answer:

Step-by-step explanation:

1) Distance covered by motorcycle = x

y  = 50 + (x -2)*10

2)Distance traveled = 5 km

y = 50 + ( 5-2) *10

  = 50 + 3*10

  = 50 + 30

  = 80

Seth will be paid Php 80

3)  y = 120

50 + (x - 2)* 10 = y

50 + (x -2) *10 = 120

50 + 10x - 2*10 = 120

50 + 10x - 20  = 120

30 + 10x = 120

       10x = 120 - 30

       10x = 90

           x = 90/10

x = 9

A passenger can travel 9 km.

4)y = (x - 2)*10

 y = 10x - 20

20 + y = 10x

     20 = 10x - y

10x - y = 20      {Ax + By = C form}

8 0
3 years ago
Does anyone know this ?
ipn [44]

Answer:

the answer is 196

Step-by-step explanation:

4x+4=60

4x+4-4=60-4

4x=56

56/4=14

14×14=196

7 0
3 years ago
An international polling agency estimates that 36 percent of adults from Country X were first married between the ages of 18 and
alukav5142 [94]

Answer:

(B) 0.2843

Step-by-step explanation:

Let d be the difference in proportions from Country X and Country Y who were first married between the ages of 18 and 32.

Then hypotheses are

H_{0}: d=0.15

H_{a}: d<0.15

Test statistic can be found using the equation

z=\frac{p1-p2-0.15}{\sqrt{{p*(1-p)*(\frac{1}{n1} +\frac{1}{n2}) }}} where

  • p1 is the sample proportion of Country X (0.36)
  • p2 is the sample proportion of Country Y (0.26)
  • p is the pool proportion of p1 and p2 (\frac{60*0.36+50*0.26}{50+60}=0.31)
  • n1 is the sample size of adults from Country X (60)
  • n2 is the sample size of adults from Country Y (50)

Then z=\frac{0.36-0.26-0.15}{\sqrt{{0.31*0.69*(\frac{1}{60} +\frac{1}{50}) }}} ≈ 0.5646

p-value of test statistic is ≈ 0.2843

p-value states the probability that the difference in proportions between a random sample of 60 adults from Country X and a random sample of 50 adults from Country Y who were first married between the ages of 18 and 32 is at least 0.15

3 0
3 years ago
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