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tigry1 [53]
3 years ago
8

Olivia wants to have a 90 average in Algebra, where tests count for 55%, quizzes count for 30%, and HW counts for 15%. If she ha

s a 92 test average and 100% HW average, what must her quiz average be?
Mathematics
1 answer:
nikitadnepr [17]3 years ago
3 0
Uiixhvxjgxufzfubicxguc
You might be interested in
pd-100 has a half-life of 3.6 days. if one had 6.02 x 1023 atoms at the start, how many atoms would be present after 20.0 days?
Irina18 [472]
<span>half-life means you divide by 2 
21.6 / 3.6 = 6 hf (hf = half-life) 
then you divide by 2^6 
6.02 x 10^23 / 2^6 = 9.40625 x 10^21 atoms 
-------------- 
26 
3hf ===> 2^3 
10.0 / 2^3 = 1.25 gram (remaining) 
answer : 10 - 1.25 = 8.75g 
------- 
27 
128 / 2^n = 2 
64 = 2^n 
n = 6 
24 /6 = 4  
4 days is the half-live of the sample 
----------- 
28 
2.5/4.46 of 50% initial mass 
(2.5/4.46) x 0.5 x 2 = 0.5605 g 
answer: 2 - 0.5605 = 1.4395 g 
---------- 
29 
2^7 = 128 
so 7 half-lifes 
7* 8040 = 56200 days 
---------- 
30 
the time of 10 half-lifes 
= 10 x 0.334s = 3.34s </span><span>
</span>
3 0
4 years ago
Which descriptions from the list below accurately describe the relationship between AQRS and ATUV? Check all that apply. 284 -28
ololo11 [35]

Answer:

All A to D

Step-by-step explanation:

The attachment completes the question

From the attachment,

  • it can be seen that QRS and TUV are of the same i.e. triangles

Also, from the attachment, the sides of each are:

RQ = UT = 22

QS = TV = 30

RS = UV = 23

And the angles are:

\angle Q = \angle T = 50

\angle R = \angle U = 83

\angle S = \angle V = 47

The above show that QRS and TUV are:

  • similar
  • same sides
  • and they are congruent

3 0
3 years ago
Consider this quadratic equation.
enot [183]

Answer:

1 positive solution (and 1 negative)

the greatest solution is about 2.87

Step-by-step explanation:

so, it is

x² + 2x + 7 = 21

x² + 2x - 14 = 0

the general solution to such a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 1

b = 2

c = -14

x = (-2 ± sqrt(2² - 4×1×-14))/(2×1) =

= (-2 ± sqrt(4 + 56))/2 = (-2 ± sqrt(60))/2 =

= (-2 ± sqrt(4×15))/2 = (-2 ± 2×sqrt(15))/2 =

= -1 ± sqrt(15)

x1 = -1 + sqrt(15) = 2.872983346... ≈ 2.87

x2 = -1 - sqrt(15) = -4.872983346...

3 0
2 years ago
Question 5
mezya [45]

Answer:

Value is 15 and measure is 151

3 0
3 years ago
Simply your answer someone help
Thepotemich [5.8K]
U^2 - u -30

Hope it helps.
5 0
3 years ago
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