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Pani-rosa [81]
3 years ago
10

Someone answer this please Sally Ann works 15 hours a week at her college library she decided to reduce her hours by 20% so that

she has more time to do her homework how many hours is sally ann working after reducing her hours
a 3 hours per week
b 5 hours per week
c 12 hours per week
d 13 hours per week
Mathematics
1 answer:
Mademuasel [1]3 years ago
5 0
A, 3 hours per week..
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HELP
larisa86 [58]
It looks like the parabola are going down, so  the coefficient should be negative,
B or C,
then we see that the parabola has x -intercepts (1,0) and (5,0)
these roots should be written as multiples 
x=1, so x-1=0
and 
x=5, so x-5=0,
so (x-1)(x-5) and negative first coefficient -2 at the same time. 
We can see only in the 
B. <span>f(x) = –2(x – 5)(x – 1)</span>
7 0
3 years ago
Read 2 more answers
Find the solutions of the equation.
FromTheMoon [43]

Answer:

it is gonna be

Step-by-step explanation:

1902837456734832902398457675483920129384576574839202398475

sorry i dont know i need more points

8 0
3 years ago
Find an equation of the sphere with center (2, −10, 3) and radius 5. $$25=(x−2)2+(y−(−10))2+(z−3)2 use an equation to describe i
lana66690 [7]

In the x,y plane, we have z=0 everywhere. So in the equation of the sphere, we have

25=(x-2)^2+(y+10)^2+(-3)^2\implies(x-2)^2+(y+10)^2=16=4^2

which is a circle centered at (2, -10, 0) of radius 4.

In the x,z plane, we have y=0, which gives

25=(x-2)^2+10^2+(z-3)^2\implies(x-2)^2+(z-3)^2=-75

But any squared real quantity is positive, so there is no intersection between the sphere and this plane.

In the y,z plane, x=0, so

25=(-2)^2+(y+10)^2+(z-3)^2\implies(y+10)^2+(z-3)^2=21=(\sqrt{21})^2

which is a circle centered at (0, -10, 3) of radius \sqrt{21}.

3 0
3 years ago
Look at photo please
amm1812

Answer:

A

Step-by-step explanation:

combining 10² and 10² makes 10⁴.

combining 1.5 and 1 makes 2.5.

so you have 10⁴ x 2.5, which is the same as the part on the other side of the equals symbol, making the equation true. All the other equations are false.

5 0
3 years ago
If Pam has 40 dollars in her account, how much money does her brother have in his account? Use a tape diagram to support your an
katen-ka-za [31]
Pam and her brother both open savings accounts. each begin with a balance of $0. For every $2 is that Pam saves in her account her brother saves $5 in his account

P:bro=2:5
when P=40 what is bro?

2/5=40/b
times 5b both sides
2b=200
divide 2
b=100
bro has $100
not sure what tape diagram is
8 0
3 years ago
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