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
BabaBlast [244]
3 years ago
7

What is the value of z in the equation 4×2-z=7?

Mathematics
1 answer:
sladkih [1.3K]3 years ago
3 0
<span>4×2-z=7
⇒ 8 - z = 7
⇒ 8 - 7 = z
⇒ 1 = z
</span>
You might be interested in
Travis earned $42.50 in 5 h.<br><br> How much will he earn in 8 h at the same rate?
zepelin [54]
Set up a proportion

42.50/5=x/8

5x=340

x=68

He would earn $68
4 0
3 years ago
Read 2 more answers
Solve this please help me
densk [106]

Answer:

1/2 or 0.5

Hope it helps!

7 0
3 years ago
Read 2 more answers
7 2/15 + 5 2/3 +9 13/15=?? A:20 3/2 B:21 2/3 C:21 10/15 D:22 2/3
nikdorinn [45]
<span>22.6666666667, in other words D. 22 2/3</span>
6 0
3 years ago
Read 2 more answers
Medicare would like to test the hypothesis that the average monthly rate for one-bedroom assisted-living facility is equal to $3
aliina [53]

Answer:

C) more than the absolute value of the critical value, we can conclude that the average monthly rate for an assisted-living facility is not equal to $3,300.

Step-by-step explanation:

Hello!

Interest hypothesizes is " the average monthly rate for one-bedroom assisted-living facility is equal to $3300" symbolically: μ = 3300

The study variable is:

X: Monthly rate for a one-bedroom assisted-living facility.

Since there is no information about the distribution of the variable, to be able to study the population mean, I'll assume that the variable has a normal distribution.

The hypothesis is:

H₀: μ = 3300

H₁: μ ≠ 3300

α: 0.05

The statistic to use, considering that there is no known population information and the sample size, is a Student t:

t= <u> X[bar] - μ </u> ~t_{n-1}

       S/√n

n= 12

X[bar]= $3690

S= $530

Using the sample data, calculate the statistic value:

t= <u> 3690 - 3300 </u> = 2.549

       530/√12

The rejection region for this test is two-tailed, with critical values:

t_{n-1; \alpha /2} = t_{11; 0.025} = -2.201

t_{n-1;1-\alpha /2} = t_{11; 0.975} = 2.201

The decision rule is:

Reject the null hypothesis if t ≤ -2.201 or if t ≥ 2.201

Not reject the null hypothesis if -2.201 < t < 2.201

Since the calculated value (2.549) is greater than the right critical value (2.201) the decision is to reject the null hypothesis.

With a signification level of 5%, there is enough evidence to reject the null hypothesis. This means that the population mean of the monthly rate for a one-bedroom assisted living facility is different from $3300.

I hope it helps!

7 0
3 years ago
Evaluate.<br>4-6(3-5)1-3<br>​
CaHeK987 [17]

Answer:

13

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Parallelogram RECT is a rectangle. If EC = x + y , RT = 2x - y, RE = 2x + y, and TC = 3x - 3 , what are the values of the variab
    6·1 answer
  • How do you use distributive property when simplifying the following?
    15·2 answers
  • Solve for a: 1/4a-17=-15
    11·1 answer
  • If the area (in square units) of the region under the curve of the function f(x) = 3x − 1 on the interval [a, 4], where a &lt; 4
    11·1 answer
  • Latoya has bought 30 pounds of dog food. She feeds her dog pounds for each meal. For how many meals will the food last?
    8·1 answer
  • What is a good minesweeper win percentage?
    10·1 answer
  • Help por fav vorrrrrr
    6·1 answer
  • An orchard has 80 apple trees and 60 peach trees. Which is NOT a ratio of apple trees to total number of trees?
    12·1 answer
  • Reflect the vector (-3,5) across<br> the line y=x.
    8·1 answer
  • X+8=6 you have to solve for x.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!