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ollegr [7]
3 years ago
6

Hi can tell what A x-21 =

Mathematics
1 answer:
tester [92]3 years ago
3 0
A \times -21 = \boxed{-21A}
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In its January 25, 2012, issue, the Journal of the American Medical Association (JAMA) reported on the effects of overconsumptio
Leviafan [203]

Answer:

b. experiment

Step-by-step explanation:

An observational study is one in which the researchers monitor the effect of a risk factor on subjects without introducing interventions for the purpose of noting differences in results. An experiment is mainly a randomized control trial where subjects are assigned to groups and chosen by chance. Interventions are also introduced by the researchers so as to note the different possible results within the groups and among participants.

The above-described process incorporates an experiment and that is why the researchers introduce protein level diet as interventions. It also employs the random assignment of subjects to different groups so as to improve the accuracy of the process.

6 0
3 years ago
−110=13+3(4h−6) i need to know the answer for h can someone help
Pepsi [2]

13+3(4h-6)=-110\ \ \ \ |-13\\\\3(4h-6)=-123\ \ \ \ |\text{use the distributive property}\\\\(3)(4h)-(3)(6)=-123\\\\12h-18=-123\ \ \ \ |+18\\\\12h=-105\ \ \ \ |:12\\\\h=-\dfrac{105}{12}\\\\h=-\dfrac{105:3}{12:3}\\\\h=-\dfrac{35}{4}

8 0
3 years ago
Read the following sentence using mathematical symbols . Twice the difference of X and 2, is -22
Cloud [144]

Answer:

2(x - 2) = -22

Step-by-step explanation:

* Lets explain how to solve the problem

- There are some words we can change it by mathematics symbols

  like the sum means (+), the difference means (-), the product

  means (×), the quotient means (÷) , one half means 1/2 , triple

  means (×3) and so one

- So we can change any word expression to a mathematical

  expression

* Lets solve the problem

- The sentence is ⇒Twice the difference of X and 2 is -22

- This sentence represents an equation

∵ Twice means Multiply by two

∵ Difference means subtract

∵ is means equal

- Lets explain the parts of the sentence

∵ Twice the difference

- That means we will make the difference at first and then

  multiply the result by 2

∴ Twice the difference of X and 2 means we will subtract 2 from x

and then multiply this difference by 2

∴ Twice the difference of X and 2 represented by 2(x - 2)

∵ Twice the difference of X and 2, is -22 means when we

   subtract 2 from x and multiply the result by 2 the answer

   will be -22

∴ Twice the difference of X and 2 =  -22

∴ 2(x - 2) = -22

* The mathematical symbols of Twice the difference of X and 2,

  is -22 is 2(x - 2) = -22

7 0
3 years ago
What’s the correct answer for this?
e-lub [12.9K]

Answer:

1) Antonio's statement

2) <A = 123

Step-by-step explanation:

1) Antonio's statement is incorrect. This is because the opposite angles of a quadrilateral add up to 180°. Erin was incorrect because the opposite angles of this quadrilateral are unequal.

2) 2x+7+5x-2 = 180° (opposite angles of quadrilateral)

Now

7x+5 = 180

7x = 175

x = 25

<A = 5x-2

= 5(25)-2

= 125-2

= 123

4 0
3 years ago
∠A and \angle B∠B are vertical angles. If m\angle A=(3x-30)^{\circ}∠A=(3x−30)
Yuki888 [10]

Answer:

x=21\textdegree

Step-by-step explanation:

So we know that:

\angle A=3x-30 \text{ and}\\\angle B=2x-9

And that the two angles are vertical angles.

Since they are vertical angles, their measurements are equivalent. Thus, to find x, set the equations equal to each other:

\angle A=\angle B\\(3x-30)=(2x-9)

Now, solve for x. Add 30 to both sides. The left side cancels:

(3x-30)+30=(2x-9)+30\\3x=2x+21

Now, subtract 2x from both sides. The right cancels:

(3x)-2x=(2x+21)-2x\\x=21

Thus, the value of x is 21.

8 0
4 years ago
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