1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Llana [10]
3 years ago
7

The sum of twice a number and seven

Mathematics
1 answer:
sergejj [24]3 years ago
7 0

Answer:

2x+7

Step-by-step explanation:

The word sum indicates addition.

Twice a number is 2x

and 7 is plus 7

You might be interested in
Fill in the blank (no word bank)
timofeeve [1]

Answer:

Alternate Interior Angles:

∠3 ≅ ∠5

Corresponding Angles:

∠3 ≅ ∠7

∠4 ≅ ∠8

Supplementary Angles:

∠3 is supplementary to ∠6

Step-by-step explanation:

7 0
3 years ago
In a quality control test of parts manufactured at Dabco Corporation, an engineer sampled parts produced on the first, second, a
sammy [17]

Answer:

p value = 0.0174

Conclusion : we reject the null hypothesis

Step-by-step explanation:

Thinking step:

We need to perform a test to determine if the proportion of the good parts is the same for all three shifts at a significance level of \alpha = 0.05

Assumption : all the population for each or the three shifts is not equal.

Calculation:

Let p₁ be the sample of the first shift

     p₂ be the sample of the second shift

     p₃ be the sample of the third shift

According to the null hypothesis

H₀ = p₁ = p₂ = p₃

In other words, all the population sample proportions are equal.

Alternatively, we can assume that the three shift are not equal p₁ ≠ p₂ ≠ p₃

Tabulating and performing the \chi² test gives 8.10

degrees of freedom:

df = k - 1

   = 3 - 1 = 2

Thus the degree of freedom is 2

Solving using the MINITAB software gives: p = 0.174

The solution shows that the p value < level of significance, then p-value lies in the range 0.0174≤\alpha≤0.05

Therefore, we reject the null hypothesis based on the fact that the three shifts are not equal.

5 0
3 years ago
Use the quadratic formula to solve the equation if necessary round to the nearest hundredth x^2+x-30=0
yaroslaw [1]

Answer:

(x-5)(x+6)=0

Step-by-step explanation:

hehe i doing the smae unit rn.

if a=1 (which it does do ac factoring)

you need two numbers that multiply to -30 and add to 1. those numbers  are 5 and -6.

substitute 1x for -5x + 6x.

group the numbers into pairs and find their gcf's

x(x-5)    6(x-5)

since the parenthesis r the same yo only need one. Now you need to put x and 6 in a parenthesis.

FINAL: (x-5)(x+6) hope this helps

6 0
3 years ago
The length of a quarter is 0.955 inch. Round the length of a quarter to the nearest tenth of an inch./8925047/32fb89d7?utm_sourc
m_a_m_a [10]
0.2387528472385828522
7 0
3 years ago
Identify the x-intercept and y-intercept of the equation below.
Radda [10]

Answer:

x intercept at (7/3 , 0)

y intercept at (0,-3)

Step-by-step explanation:

9x-7y=21

we need to find x  and y intercepts

To find x intercept , plug in 0 for y

9x - 7(0) = 21

9x = 21

divide by 9 on both sides

x= 21/ 9 = 7/3

so x intercept at (7/3 , 0)

To find y intercept , plug in 0 for x

9(0) - 7(y) = 21

-7y = 21

divide by -7 on both sides

y= -3

so y intercept at (0,-3)

6 0
3 years ago
Other questions:
  • What is the probability a sample of 90 test takers will provide a sample mean test score within 10 points of the population mean
    8·1 answer
  • -3-(-2x) = -6<br> What’s X
    6·1 answer
  • Help my sister step by step show work so she can understand because I forgot how to do this stuff
    10·1 answer
  • The ordered pairs {(1, 2), (2, 3), (3, 4)} could be answers for the function rule x + 1. (If you put the x value in, would you g
    14·1 answer
  • There are five different colors of lollipops in a jar: 4 orange, 3 green, 4 red, 2 yellow, and 2 purple. Roberta draws out one l
    7·2 answers
  • What is x in this equation −4.5= −0.5(x − 7.1)
    7·1 answer
  • Miles has a train collection with 36 engines, 72 boxcars, and 18 cabooses. He wants to arrange the train cars in equal rows with
    6·1 answer
  • PLEASE HELPPPPPPPPPPPPPPPPP I WILL GIVE BRAINLIST
    12·1 answer
  • Which is the correct description of how to find the volume of a cylinder?
    7·2 answers
  • Find the surface area of the triangular prism.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!