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
Alex
2 years ago
8

Find the value of the following expression 100 - 2(x + 5) when x = 10 *

Mathematics
2 answers:
Ede4ka [16]2 years ago
4 0

Answer:

70

Step-by-step explanation:

100 - 2(x + 5) = 100 - 2x - 10 = 90 -2x

90 - 2x

90 - 2×10

90 - 20 = 70

zubka84 [21]2 years ago
4 0
yep that’s correct!
You might be interested in
Convert the following degree measure to radian measure. 90 degrees
Ray Of Light [21]
90 degrees converted to radians is pi/2 or π/2 radians.
4 0
3 years ago
Calls to a customer service center last on average 1.4 minutes with a standard deviation of 1.7 minutes. An operator in the call
igomit [66]

Answer:

the expected total amount of time in minutes is 88.4

Step-by-step explanation:

The computation of the expected total amount of time in minutes is given below:

= Standard deviation × needed to answer calls each day

= 1.7 × 52

= 88.4

hence, the expected total amount of time in minutes is 88.4

8 0
3 years ago
Given a table of values of a quadratic function, which of the following do you absolutely need in order to find its equation? *
nadya68 [22]

Answer:

The general form of a quadratic function is --> y = ax2 + bx + c

Since (0, -2) exists for the function, we can plug in those values:

-2 = a(0)2 + b(0) + c

-2 = 0 + 0 + c

-2 = c

So now our function so far is --> y = ax2 + bx - 2

We have two pairs of coordinates left: (-1, -8) and (3, -8).

First, plug in the first pair and simplify as much as you can:

-8 = a(-1)2 + b(-1) - 2

-8 = a - b - 2 ( add 2 to both sides )

-6 = a - b (stop here because we can't go further)

Second, plug in the second pair and simplify as much as you can:

-8 = a(3)2 + b(3) - 2

-8 = 9a + 3b - 2 ( add 2 to both sides )

-6 = 9a + 3b (stop here because we can't go further)

Now we have these two equations left:

a - b = -6

9a + 3b = -6

Now we solve for a and b using systems of equations, using one of three ways:

substitution

elimination

graphing (not my favorite, but it is doable)

Using substitution:

a - b = -6 can be rewritten as a = b - 6

plug into the second equation and solve for b

9(b - 6) + 3b = -6 (distribute the 9)

9b - 54 + 3b = -6 (combine all of the b's)

12b - 54 = -6 (add 54 to both sides)

12b = 48 (divide by 12 on both sides to isolate b)

b = 4

plug b into one of the original two equations

a - 4 = -6 (add 4 to both sides)

a = -2

The quadratic equation for this table is y = -2x2 + 4b - 2

6 0
2 years ago
A local​ eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has
Mamont248 [21]

Answer:

Step-by-step explanation:

The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 34 minutes. This is the null hypothesis. It is written as

H0 : µ ≤ 34

The alternative hypothesis would be

Ha : µ > 34

This is a right tailed test because of the greater then symbol in the alternative hypothesis. Since the p value for the test was found to be 0.0281281, if we use a significant level of 0.05, then the conclusion would be

Reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the average time spent on the deliveries does exceed 34 minutes.

4 0
3 years ago
Please help with 8th grade math (will give brainliest)
BigorU [14]
He is waiting in letter P
4 0
3 years ago
Other questions:
  • NEED ANSWER NOW. WILL MARK BRAINLIEST
    10·2 answers
  • Define<br> Trapezium, kite, isosceles Trapezium
    14·1 answer
  • Whitney's car goes 33 1/4 miles per gallon of gasoline. How far can it go on 9 1/2 gallons of gasoline?
    5·1 answer
  • Evaluate 6(x-4) + 10 if x= 7<br> A.28<br> B.76<br> C.18<br> D.13
    8·1 answer
  • Which ordered pair is generated from the equation shown below? y = 2x + 4 A. (1, 6) B. (1, 2) C. (3, 6) D. (8, 16)
    14·1 answer
  • In the section describing the survey methods, the report states, “For results based on the total sample of national adults, the
    9·1 answer
  • For a given population of high school seniors, the Scholastic Aptitude Test (SAT) in mathematics has a mean score of 500 with a
    6·1 answer
  • 1<br> Solve this quadratic using two different<br> methods. Show both methods.<br> x2 + 4x - 5 = 0
    5·1 answer
  • The research question is: Do the data provide evidence that the treatments affect the mean LDL level in this population
    8·1 answer
  • molly is 4 years younger than Heidi. In 3 years, Heidi will be twice as old as Molly. How old are they now
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!