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
12

What number is the same as 7 tens and 21

Mathematics
1 answer:
Alexandra [31]3 years ago
5 0
91 is the number because 7x10 =70 +21=91
You might be interested in
Evaluate the expression w 2 - v + 1 for w = -2 and v = -8.
Aleksandr [31]

Answer:

Is the w2, w(2) or

{w}^{2}

?

If it's w(2) the answer is -4--8+1=-4+8+1=5

if it's w^2 then the answer would be 4--8+1=4+8+1=13

4 0
2 years ago
Evaluate y = 7x when x = -5
borishaifa [10]

Answer:

-35

Step-by-step explanation:

7 x -5 = -35

hope this helped!! ^^

5 0
2 years ago
FIND AREA OF SHADED SEGMENT. WILL GIVE BRAINLIEST FOR CORRECT ANSWER
Xelga [282]
By geometry,
area \: of \: shaded \: region \:  =  (\: area \: of  \: square \:  -  \: 2 \times (area \: of \: semi - circles)) \div 2
=  ({l}^{2}  - 2 \times \pi  \times {r}^{2} ) \div 2
l = 6 \\ r = l \div 2 = 3
= (36 - \pi \times  {3}^{2} ) \div 2
= 3.86
area of shaded region = 3.9
3 0
3 years ago
Read 2 more answers
How would i solvd this problem as sn improper fraction 2 1/8
zmey [24]
17/8..........................................
7 0
2 years ago
Read 2 more answers
The mean income per person in the United States is $44,500, and the distribution of incomes follows a normal distribution. A ran
Artist 52 [7]

Answer:

We conclude that the residents of Wilmington, Delaware, have higher income than the national average

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = $44,500

Sample mean, \bar{x} = $52,500

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, s =  $9,500

a) First, we design the null and the alternate hypothesis

H_{0}: \mu = 44,500\text{ dollars}\\H_A: \mu > 44,500\text{ dollars}

We use one-tailed(right) t test to perform this hypothesis.

c) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{52500 - 44500}{\frac{9500}{\sqrt{16}} } = 3.37

b) Rejection rule

If the calculated t-statistic is greater than the t-critical value, we fail to accept the null hypothesis and reject it.

Now,

t_{critical} \text{ at 0.05 level of significance, 15 degree of freedom } = 1.753

Since,                    

t_{stat} > t_{critical}

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis. We conclude that the residents of Wilmington, Delaware, have higher income  than the national average

5 0
3 years ago
Other questions:
  • Find the solution set. |x|= 9<br> A. { }<br> B. {-3 , 3}<br> C. { -9, 9}<br> D. {-81, 81}
    13·2 answers
  • What is 103% of 127 tons???
    15·1 answer
  • What is the mode(s) of this data?
    7·1 answer
  • What is the recursive rule for this geometric sequence?
    10·1 answer
  • Triangle ABC has been reflected over the x-axis to create triangle A′B′C′. Which of the following statements is true? B′C′ = 2 A
    9·2 answers
  • A set of data has been organized using the stem-and-leaf plot below. What is the range of the data?
    13·1 answer
  • Find the mean absolute deviation of 22,25,80,55,32,68,73,45​
    13·1 answer
  • Line AB contains points A(4, 5) and B(9,7). What is the slope of AB?
    6·1 answer
  • Help i need help math is hard hard
    10·1 answer
  • Find the area of a trapezium whose parallel sides are respectively 14cm and 4cm and distance between the parallel sides is 5cm.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!