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Ivenika [448]
2 years ago
11

for what values of A does the acute angle formed by the lines 3x+2y=10 and Ax-2y=3 have measure of 45 degree

Mathematics
1 answer:
Nonamiya [84]2 years ago
8 0

Answer:

Step-by-step explanation:

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Help please can’t get this wrong. Am I doing this right if not correct me. And how do I write it
zhannawk [14.2K]

Answer:

a<-7/2 or a>1

Step-by-step explanation:

2a+5<-2 or -4a-1<-5

2a<-2-5 -4a<-5+1

2a<-7. -4a<-4

2a/2<-7/2 -4a/-4<-4/-4

a<-7/2 a>1

4 0
3 years ago
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A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain
alina1380 [7]
So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound H_2 O
its two hydrogen atom plus an oxygen molecule, making it about 18g per mol.

That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water? 
We just do a cross multiplication:
\frac{(0.5)}{18} =0.027 mol
7 0
3 years ago
john is 15 years old. john's mom takes him and his younger soster to a football game. tickets are $22 for adults and $16 for chi
Maksim231197 [3]

Answer:

$38

Step-by-step explanation:

cost of ticket for adult = $22

cost of ticket for youngster = $16

______________________________

cost of ticket for John's mom = $22 as she is adult

cost of ticket for john = $16 as he is young , his age is less than 18 years

Total cost of ticket for John and his mother = $22 + $16 = $38

5 0
3 years ago
What type of numbers has exactly two factors?
nlexa [21]
Rime: A number with exactly two factors; one and itself. What does this mean? This means that for us to call a number prime, only two whole numbers can divide into it without a remainder. Here are a few examples: 2, 3, 5, 7, 11<span>, </span>13<span>, </span>17<span>, </span>19<span>, </span>23<span>, and so on.</span>
7 0
3 years ago
The regression equation for change in temperature, y, to amount of humidity in
mr_godi [17]

Answer:

Residual = 11.462

Since the residual is positive, it means it is above the regression line.

Step-by-step explanation:

The residual is simply the difference between the observed y-value which is gotten from the scatter plot and the predicted y-value which is gotten from regression equation line.

The predicted y-value is given as 20.7°

The regression equation for temperature change is given as;

y^ = 9.1 + 0.6h

h is the observed amount of humidity and it's given to be 23 percent or 0.23.

Thus;

y^ = 9.1 + 0.6(0.23)

y^ = 9.238

Thus:

Residual = 20.7 - 9.238

Residual = 11.462

Since the residual is positive, it means it is above the regression line.

3 0
3 years ago
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