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
Kryger [21]
3 years ago
14

QT 1.

Mathematics
2 answers:
umka2103 [35]3 years ago
8 0
Here's the work:

1. (6 x 5) + (14 x 8) = 142
142/20 = 7.1

2. (8 x 6) + (12 x 9) = 156 
156/20 = 7.8

3. (86 x .8) + (93 x .2) = 87.4

4. (0.1 x 0.85) + (0.4 x 0.7) + (0.5 x 0.75) = 74%

5. (8 x 0.5) + (5 x 0.2) + (8 x 0.3) = 7.4

Sorry this took so long!
max2010maxim [7]3 years ago
7 0
#1 7.1 years old
#2 7.8 years old
#3 87.4
#4 74
#5 7.4
You might be interested in
In certain county, the number of charter schools is 4 less than twice the numbervof alternative schools. We know that there are
Vitek1552 [10]
1. Let's call the number of carter school: "x" and "y" the number of alternative school.  Then, you have that:

 - T<span>he number of charter schools is 4 less than twice the number of alternative schools.
</span> - T<span>here are 48 charter schools in the country.

 2. So, you have:

 x=2y-4  (i)

 x=48  (ii)

 3. Then, when you substitute x=48 into the equation (i), you obtain:
</span>
 x=2y-4
<span> 48=2y-4

 4. Now, you must clear "y, as below:

 48+4=2y
 2y=52
 y=52/2
 y=26
 </span><span>
 How many alternative schools are in the county?
</span><span>
 The answer is: There are 26 alternative schools.</span>
6 0
3 years ago
How do I do this problem ??
kati45 [8]
See attached picture for solution:

3 0
3 years ago
Franklin bought a book with 90 pages. If he
BartSMP [9]
The answer is A) 60%
3 0
3 years ago
Given the sequence 8, 12, 16, 20, 24, what is the sum of the 31st and 19th terms?
erica [24]

Answer:

First term (a) =8

Common difference (d)= t2-t1

=12-8

=4

Now, sum of first 31th term (tn31) =n/2{2a+(n-1)d}

= 31/2{2×8+(31-1)4}

=31/2{16+(30×4)

=31/2(16+120)

=31/2×126

=31×63

Step-by-step explanation:

Similarly use 19 as (n) for the 19th term

7 0
3 years ago
A player kicks a soccer ball from a height of 2 feet. The ball reaches A maximum height of 20 feet after traveling 40 feet horiz
Artyom0805 [142]

The height is 9.875 feet from which the goalkeeper catches the ball.

The player kicks soccer from a height of 2 feet

x = 0 and y = 2

Maximum height of 20 feet after traveling 40 feet

x = 40, y = 20

So let y = a(x - 40)² + 20  ( the path of parabola)

Since x = 0 , y = 2

So, 2 = a(0 - 40)² + 20

2 = 1600a + 20

-18 = 1600a

a = - 9/800

Thus, y = -9/800(x - 40)² + 20

Since the soccer is caught by the goalkeeper 70 feet from where it was kicked

x = 70

So at this time,

y = -9/800 ( 70 - 40)² + 20

  = -9/800 × 900 + 20

  = - 81/8 + 20

  = 79/ 8

  = 9.875 feet

Therefore the height at which the goalkeeper catches the ball is 9.875 feet.

To know more about the height refer to the link given below:

brainly.com/question/27030273

#SPJ1

7 0
1 year ago
Other questions:
  • This is the third time I'm asking. I feel like Brainly won't help anyone above middle school but whatever. It's Geometry. Pls an
    14·1 answer
  • What percentage of Priya's distance did Tyler walk​
    9·1 answer
  • What is the number of ways to arrange 6 objects from a set of 10 different objects
    13·2 answers
  • Solve #5<br> Is the equation that you use<br> P(t)=P(0)•e^rt ?
    12·1 answer
  • Jordan made a bar graph to represent how he usually spends his time in a 24 hour period. Which of the following statements are t
    7·2 answers
  • F(x) = x^2- 5X +6 what are the values of the coefficients
    5·1 answer
  • Which of these tables represents a linear function?
    9·2 answers
  • HELP ILL MARK BRAINLIEST
    5·1 answer
  • Simplify (-w^3/6)^-2
    14·1 answer
  • If you spun the spinner 1 time, what is the probability<br> it would land on a gray piece?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!