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iren [92.7K]
3 years ago
5

Please help! Question in the picture below!! Will mark brainliest!

Mathematics
2 answers:
dangina [55]3 years ago
5 0

Hello from MrBillDoesMath!

Answer:

3 sqrt(70) - 6 sqrt(30)

Discussion:

3 sqrt(10)   ( sqrt(7) - 2 sqrt(3)) =

3 sqrt(10*7) - 6 sqrt(3*10) =

3 sqrt(70) - 6 sqrt(30)

Not sure if this is what they wanted

Thank you,

MrB

Nutka1998 [239]3 years ago
3 0

Answer:

Exact Form:

3 √7 0 − 6 √ 30

Decimal Form:

−

7.76355265 ...

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9/15 as a whole number
Airida [17]

Answer:

1 and 2/3 I think- I hope this helps

7 0
3 years ago
A company tests the life of its rechargeable batteries over six months of use. They test how long a battery will last after a fu
jonny [76]

Answer:

18.6 months

Step-by-step explanation:

Given that :

Best fit line from scatterplot :

y=-12.05x +224.26

x = Number of month

y = charge on battery

Number of months a typical battery uses before being dead completely :

When battery is dead completely ; charge =0, y = 0

y = -12.05x + 224.26

0 = - 12.05x + 224.26

12.05x = 224.26

x = 224.26 / 12.05

x = 18.610788

Hence, 18.6 months before battery is completely dead.

4 0
2 years ago
If a 200 N net force acts on a 500 grams car, what will the acceleration of the car be? ​
ladessa [460]

Answer:

The acceleration of the car will be 400 m/s².

Step-by-step explanation:

The acceleration of the car can be found using Newton second law:

F = ma

Where:

F: is the net force = 200 N

m: is the mass = 500 g

a: is the acceleration =?

Then, the acceleration will be:

a = \frac{F}{m} = \frac{200 N}{500 g*\frac{1 kg}{1000 g}} = 400 m/s^{2}  

Therefore, the acceleration of the car will be 400 m/s².

I hope it helps you!

4 0
2 years ago
A ball is shot into the air using a brand new super-high-tech robotic arm to help baseball players practice catch fly balls.
stepladder [879]

Answer:

69 feet

Step-by-step explanation:

we have

h(t)=-16t^{2}+64t+5

where

h(t) is the height of the ball

t is the time in seconds

we know that the given equation is a vertical parabola open downward

The vertex is the maximum

so

the y-coordinate of the vertex represent the maximum height of the ball

Convert the quadratic equation into vertex form

The equation in vertex form is equal to

y=(x-h)^{2}+k

where

(h,k) is the vertex of the parabola

h(t)=-16t^{2}+64t+5

h(t)-5=-16t^{2}+64t

h(t)-5=-16(t^{2}-4t)

h(t)-5-64=-16(t^{2}-4t+4)

h(t)-69=-16(t^{2}-4t+4)

h(t)-69=-16(t-2)^{2}

h(t)=-16(t-2)^{2}+69

the vertex is the point (2,69)

therefore

The maximum height is 69 ft

6 0
3 years ago
A line that includes the points (8,1) and (k,9) has a slope of 8. What is the value of k?
kogti [31]

Answer:

Step-by-step explanation:

I don’t know

8 0
3 years ago
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