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lianna [129]
3 years ago
13

Which expression correctly represents “twice the sum of four and a number”?

Mathematics
2 answers:
shtirl [24]3 years ago
7 0
2x(4+d)   D is a variable
bulgar [2K]3 years ago
4 0
2(4+x) should be correct
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Maria has five orange, seven green, three red, and nine blue toothpicks in a bag. If Maria randomly selects one toothpick out of
Kryger [21]
Well first you have to find how many toothpicks in the bag so O+G+R+B=24. So 24 toothpicks in a bag. And R+B=12 so you can simplify and do 1 of the following

1.12    2. 6    3. 3    4. 2      5. 1
   ---        --      --        --          ---
  24        12      6        4           2

Hope this helps!!
3 0
3 years ago
3. The length of arc EF is 5 in. Find<br> the length of the radius.
KiRa [710]

Answer:

radius = 30 in

Step-by-step explanation:

EF = circumference × fraction of circle, substitute values

5π = 2πr × \frac{30}{360} ← where r is the radius

5π = 2πr × \frac{1}{12}

Multiply both sides by 12 to clear the fraction

60π = 2πr ( divide both sides by 2π )

\frac{60\pi }{2\pi } = r, thus

r = 30 in

3 0
4 years ago
Read 2 more answers
This table represents a proportional relationship. Find the constant of proportionality.
Pavel [41]

Answer:

1. 4

2. y = 4x

Step-by-step explanation:

1.

Divide any y value by its corresponding x value to find the constant of proportionality.

8/2 = 4

Constant of proportionality: 4

2.

Equation of proportional relation:

y = kx, where k is the constant of proportionality.

y = 4x

7 0
4 years ago
Read 2 more answers
Write an equation for the line parallel to the given line that contains C.<br> C(2,8); y = - 4x + 3
Luba_88 [7]

Answer: i love brinly its the best

the value of x is 4, make m||n

Step-by-step explanation:

sorry if this is wrong

3 0
3 years ago
Which of the following represents a Type I error for the null and alternative hypotheses H0:μ≤$3,200 and Ha:μ&gt;$3,200, where μ
Nuetrik [128]

Answer:

Option a) Type I error would occur if we reject null hypothesis and conclude that the average amount is greater than $3,200 when in fact the average amount is $3,200 or less.        

Step-by-step explanation:

We are given the following information in the question:

H_{0}: \mu \leq \$3,200\\H_A: \mu > \$3,200

where μ is the average amount of money in a savings account for a person aged 30 to 40.

Type I error:

  • Type I error is also known as a “false positive” and is the error of rejecting a null  hypothesis when it is actually true.
  • In other words, this is the error of accepting an  alternative hypothesis when the results can be  attributed by null hypothesis.
  • A type I error occurs during the hypothesis testing process when a null hypothesis is rejected, even though it is correct and should not be rejected.

Thus, in the above hypothesis type  error will occur when we reject the null hypothesis even when it is true.

Option a) Type I error would occur if we reject null hypothesis and conclude that the average amount is greater than $3,200 when in fact the average amount is $3,200 or less.

3 0
3 years ago
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