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3 years ago

Help me plz i dont understand

Mathematics

1 answer:

kow [346]3 years ago

4 0

1.) 0.4 × 0.7

Ignore the "dots" and multiply "regularly".

4 × 7 = 28

0.4 (1)
× 0.7 (1)
____
28.

add the amount of spaces after the decimal point (the dot).

2

Move the decimal point that many times

2.8

.28

0.28 (answer)

2.) 1.1 × 2.4

1.1 (1)
× 2.4 (1)
______
11 × 4
+ 20 × 11
_______
44
+ 220
_______
264

Move the decimal point 2 times

264

26.4

2.64 (final answer)

#4 through #8: same thing

9.) Chan Hee bought 3.4 pounds of coffee. He spent $6.95 per pound.

To solve this problem, you need to multiply 3.4 by $6.95, to find out how much money that Chan Hee spent on the coffee, in total.

3.4 (6.95)

Now try #10 on your own.
Remember that you want to find out the total amount of money Adita earns by multiplying.

11.) By looking at the chart, you can find out what values you have to multiply.

Focus on Week Two.

Multiply the cost per gallon with gallons bought.

12.) Do the same thing as #11, but for Weeks 4 and 1 separately.

Now, subtract the final value from Week 1 fron Week 4. Remeber to line up the decimals.

Good luck and if you need more help, please message me.

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Using only four 4's and any operational sign find the value of 8

torisob [31]

Answer:

The answer is 4 + 4 + 4 - 4 = 8

Step-by-step explanation:

The four fours problem is one of the problems given in the book "The Man Who Calculated" by Malba Tahan, a Brazilian-born professor of mathematical sciences.

There are many complicated problems in this book made with the intention of using logic to find a value.

The 4 fours problem is based on using these numbers and using any operation to result in the numbers 1 through 10.

4 0

3 years ago

Assuming that the equations define x and y implicitly as differentiable functions x=f(t),y=g(t) find the slope of the curve x=f(

Mumz [18]

The given equations are
$x(t+1)-4t \sqrt{x} =9$ (1)
$2y+4y^{3/2}=t^{3}+t$ (2)

When t=0, obtain
$x=9 \\ 2y+4y^{3/2}=0 \,\,=\ \textgreater \ \, y(1+2 \sqrt{y} )=0 \,=\ \textgreater \ \,y=0$

Obtain derivatives of (1) and find x'(0).
x' (t+1) + x - 4√x - 4t*[(1/2)*1/√x = 0
x' (t+1) + x - 4√x -27/√x = 0
When t=0, obtain
x'(0) + x(0) - 4√x(0) = 0
x'(0) + 9 - 4*3 = 0
x'(0) = 3
Here, x' means $\frac{dx}{dt}$ .

Obtain the derivative of (2) and find y'(0).
2y' + 4*(3/2)*(√y)*(y') = 3t² + 1
When t=0, obtain
2y'(0) +6√y(0) * y'(0) = 1
2y'(0) = 1
y'(0) = 1/2.
Here, y' means $\frac{dy}{dt}$ .

Because $\frac{dy}{dx} = \frac{dy}{dt} / \frac{dx}{dt}$ , obtain
$\frac{dy}{dx} |_{t=0}\, = \frac{1/2}{3}= \frac{1}{6}$

Answer:
The slope of the curve at t=0 is 1/6.

3 0

3 years ago

Mi is about to roll a six-sided number cube. What is the experimental probability that she will roll an even number based on her

Kryger [21]

Answer: The experimental probability that she will roll an even number= $\frac{1}{2}$

Step-by-step explanation:

We know that the probability for any event is given by6;-

$\text{Probability}=\frac{\text{Favorable outcomes}}{\text{Total outcomes}}$

In a dice, the total even numbers (2,4,6)= 3

Therefore, the probability that she will roll an even number will be given by:-

$\text{Probability}=\frac{\text{3}}{\text{6}}=\frac{1}{2}$

Hence, The experimental probability that she will roll an even number= $\frac{1}{2}$

6 0

4 years ago

HELP!! BRAINLIEST!! +15 POINTS!! REAL ANSWERS ONLY PLEASE

MissTica

Lol that’s so easy haha

8 0

3 years ago

A store is having a closing sale. All items in the store are 35% off. Samantha found a jacket she wants to buy with an original

laila [671]

Answer:

The final price paid by Samantha is 55.25 $

Step-by-step explanation:

In order to find out the final price of the jacket for Samantha we need to calculate how much 35% of 85 $ is and subtract the original price by it. So we have:

price of discount = 85*(35%) = 85*(35/100) = 85*(0.35) = 29.75 $

Now we can compute the final price by subtracting the original price by the price of discount. So we have:

final price = original price - price of discount = 85 - 29.75 = 55.25 $

7 0

3 years ago

Read 2 more answers