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
Marina CMI [18]
3 years ago
7

silvia's test scores are 86,81 and 92 what must she score on her fourth test in order to have an average of 90 for all four test

s
Mathematics
2 answers:
lianna [129]3 years ago
8 0
90 * 4 = 360 (total of 4 tests for average of 90)

86 + 81 + 82 = 259 (total first 3 tests)

360 - 259 = 101

answer:
In order to have an average of 90, she must score 101 on her 4th test.
belka [17]3 years ago
7 0
Silvia has to score a 101 to get an average of 90 for all four tests.
Explanation: 90=(86+81+92+x)/4
                     360=259+x
                     101=x
You might be interested in
If ƒ (x ) = 2x 2 + 3, find ƒ (3).
dimulka [17.4K]

Answer:

f(x) = 2 \times 2 + 3 \\ f(3) = 4  + 3 \\ 3f = 7 \\ f =  \frac{7}{3}

<h2>Hope it help you</h2>
3 0
3 years ago
Read 2 more answers
What is the probability that a student who is not in band plays an instrument?
uranmaximum [27]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Please help ASAP I don’t understand
madreJ [45]

Answer:

88 square inches

Step-by-step explanation:

if the entire square was shaded it would be 14 x 12  (as best as i can see)

the "cut out" or white part of the square is 8 x 10

Entire squre - cutout white part

14 x 12     -  8 x 10

168 - 80

88 sq in

4 0
3 years ago
Which point is an x-intercept of the quadratic equation (x-8)(x+9)
defon

Solve for x in each set of parentheses by setting them to 0:

X -8 = 0

X = 8

X+9 = 0

X =-9

You have two x intercepts (8,0) and (-9,0)

You didn’t list any choices to pick from but it would be either if the ones above.

5 0
3 years ago
Read 2 more answers
2sec^2x - secx - 1 = 0
Ivenika [448]
What are you trying to do here?
Solve the graph, or make it appear as something else?

First, we're going to take one sec (x) out so that we get:
sec (x) (2sec (x) -1 -1) = 0

sec (x) (2sec (x) -2) = 0


Then we're going to separate the two to find the zeros of each because anything time 0 is zero.

sec(x) = 0

2sec (x) - 2 = 0

Now, let's simplify the second one as the first one is already.

Add 2 to both sides:

2sec (x) = 2

Divide by 3 on both sides:

sec (x) = 1


I forgot my unit circle, so you'd have to do that by yourself. Hopefully, I helped a bit though!
8 0
3 years ago
Other questions:
  • If f(x) =x/2 -2 and g(x) = 2x2 + x - 3, find (8 +g)(x),
    6·2 answers
  • What is -1.3 ≥ 2.9 -0.6r graph the solution
    10·1 answer
  • A company manufactures two products. A and B on two machines, I and II. It has been determined that the company will realize a p
    7·1 answer
  • <img src="https://tex.z-dn.net/?f=%20-%2016%281.2%29%5E%7B2%7D%20%2B%2038.4%281.2%29%20%2B%200.96" id="TexFormula1" title=" - 16
    9·2 answers
  • 40 POINTS AND BRAINLIEST
    11·1 answer
  • The length of a rectangular park is 20 feet longer than the width of the park. If the lenght of the park is 36 feet, what is the
    8·1 answer
  • My question is that fourty-one plus eighty-four equals what?
    10·2 answers
  • Can anyone help me with it?
    5·1 answer
  • Perimeter of equilateral triangle is 12cm find it area​
    15·1 answer
  • What is the distance between (1,4) and (-2,-3)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!