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2 years ago

How do you solve -3 x 5?

Mathematics

1 answer:

LiRa [457]2 years ago

5 0

-15 is the answer, you just multiply it. And add the sign

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Write greatest unit fractions that are repeating decimals. Then express each fraction as a decimal.

LekaFEV [45]

Our repeating decimal would be= 0.5555….
Let’s give 0.5555….. repeating decimal a variable of x:
x= 0.5555…. or 0.5(move 1 point to the right)
So ,10x = 5.5555 or 5.5

Now, Let’s do subtraction:
10x = 5.5555… or 5.5
- x = 0.5555… or 0.5
9x = 5.0 or 5.0

To get a fraction, provide a denominator the same with the numerator of variable x which is 9. Then divide the difference:
9x = 5.0
9 9 Therefore, x = 5
 9

7 0

3 years ago

PLEASE HELP ME !! PLEASE !!

Yakvenalex [24]

I think that it is a ok

6 0

3 years ago

Here are two closed containers and four balls just fit into each container. Each ball has a diameter of 60mm. Which container ha

Studentka2010 [4]

Answer:

Container B has smaller surface area.

Step-by-step explanation:

Given:

Container A

Radius = 60/2 = 30 mm

Height = 4 x 60 = 240 mm

Container B

Length = 120

Width = 120

Height = 60

Computation:

Surface area of container A (Cylinder) = 2πr[h+r]

Surface area of container A (Cylinder) = 2[22/7][60][120+60]

Surface area of container A (Cylinder) = 67,885.70 mm² (Approx)

Surface area of container B (Cuboid) = 2[lb+bh+hl]

Surface area of container B (Cuboid) = 2[(14,400)+(7,200)+(7,200)]

Surface area of container B (Cuboid) = 57,600 mm²

Container B has smaller surface area.

8 0

3 years ago

A $40.00 skateboard is discounted 30%. If sales tax is 5%, what is the amount of tax paid?

tekilochka [14]

$29.40 ........ 40x0.3=12....... 40-12=28...... 28x1.05= $29.40

7 0

3 years ago

Read 2 more answers

A chemist is mixing two solutions, solution A and solution B. Solution A is 15% water and solution Bis 20% water. She already ha

LiRa [457]

Answer:

15 ml

Step-by-step explanation:

We are told

Solution A = 15% of water

Solution B = 20% of water

Let's assume, the entire solution = 100ml

We are told that in the beaker we have 10 ml of Solution A already

Mathematically,

100 ml = 15%

10 ml = X

100ml × X = 15 × 10

X = 150/ 100

X = 1.5%

Hence in the beaker, we have 1.5% of water from Solution A

We are asked to find how many ml of solution B must be added to make the solution have 18% of water

Let y = number of ml of solution B

Hence

10 ml × 15%(0.15) = 1.5 ml of water - Equation 1

y ml × 20%( 0.20) = 0.20y ml of water ...... Equation 2

Add up the above equation

10ml + y ml ×18% (0.18) = 1.5 + 0.20y

(10 + y)(0.18) = 1.5 + 0.20y

1.8 + 0.18y = 1.5 + 0.20y

Collect like terms

1.8 - 1.5 = 0.20y - 0.18y

0.3 = 0.02y

y = 0.3/0.02

y = 15ml

Therefore,15mL of solution B must be added to the beaker in order to create a mixture that is 18% water

4 0

3 years ago