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2 years ago

5w+10=40

Mathematics

1 answer:

Ratling [72]2 years ago

6 0

Answer:

Step-by-step explanation:

5w+10=40

5w=40-10

5w=30

w=30/5

w=6

Answer: A) 6

-------------------

10k+5=65

10k=65-5

10k=60

k=60/10

k=6

Answer: k=6

-------------------

2b-15=33

2b=33+15

2b=48

b=48/2

b=24

Answer: b=24

-----------------------

3d+18=21

3d=21-18

3d=3

d=3/3

d=1

Answer: d=1

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Principal=$100 rate=5% years=3 what is the interest?

hammer [34]

Answer:

Interest would be $15 every 3 years

Step-by-step explanation:

Interest = Principal x Rate x Time

Interest = 100 x 5% x 3

Interest = 5 x 3

Interest = 15

6 0

2 years ago

A soup can will have a radius of 4 cm and a

DENIUS [597]

Answer:

<h3> It's about 365 cm²</h3>

Step-by-step explanation:

2×πr² + 2πr×h =

= 2×π×4² + 2π×4×10.5 =

= 32π + 84π =

= 116π ≈

≈ 364.42 cm²

5 0

2 years ago

A parabola has a focus of F(2, -0.5) and a directrix of y=-1.5 P(x,y) represents any point on the parabola, while D(x, -1.5) rep

prohojiy [21]

The sketch of the parabola is attached below

We have the focus $(a,b) = (2, -0.5)$
The point $P(x,y)$
The directrix, c at $y=-1.5$

The steps to find the equation of the parabola are as follows

Step 1
Find the distance between the focus and the point P using Pythagoras. We have two coordinates; $(2, -0.5)$ and $(x,y)$ .
We need the vertical and horizontal distances to find the hypotenuse (the diagram is shown in the second diagram).
The distance between the focus and point P is given by
$\sqrt{ (x-a)^{2}+ (y-b)^{2} }$

Step 2
Find the distance between the point P to the directrix $c$ . It is a vertical distance between y and c, expressed as $y-c$

Step 3
The equation of parabola is then given as
$\sqrt{ (x-a)^{2}+ (y-b)^{2} }$ = $y-c$
$(x-a)^{2}+ (y-b)^{2}= (y-c)^{2}$ ⇒ substituting a, b and c
$(x-2)^{2}+ (y--0.5)^{2} = (y--1.5)^{2}$
$(x-2)^{2}+ (y+0.5)^{2}= (y+1.5)^{2}$ ⇒Rearranging and making $y$ the subject gives

$y= \frac{ x^{2} }{2} -2x+1$

7 0

3 years ago

Help me PLEASEEEeeee

Harlamova29_29 [7]

Answer:

y=-2x-2

Step-by-step explanation:

Just ask.

Hope this helped! :)

8 0

2 years ago

1. Sally said that when you add or subtract positive or negative decimals, you can change the order of the decimals and still ge

siniylev [52]

Always true because addition and subtraction is commutative
-6.2-(-3.96) = -2.24
-3.96-(-6.2)= -2.24
5.71+2.84=8.55
2.84+5.71=8.55
Hope this helped :)

3 0

2 years ago