All categories

3 years ago

Please can u help me with number two please I'm so lost and I don't know on what to do

Mathematics

2 answers:

zhenek [66]3 years ago

8 0

You would know 4×5=20 so just add 2 more zeroes cause there is a zero in 40 and in 50

hope this is what you're looking for and made sense

dybincka [34]3 years ago

7 0

All you have to do to find 40*50 in your mind, is multiply 4 and 5. Then you will have to add the two 0s at the end. So it will go like 4*5=20+0+0=2,000

You might be interested in

What is the slope of a line perpendicular to ta line whose equation is y = -3/4x - 6

svp [43]

Answer:

4/3

Step-by-step explanation:

y = -3/4x - 6

m = -3/4

Slope of the line perpendicular to this line = -1/m

= -1 ÷ (-3/4)

$= (-1)*\frac{4}{-3}\\\\=\frac{4}{3}$

6 0

3 years ago

. Let X and Y be random variables of possible percent returns (0%, 10%,

bazaltina [42]

(a) The marginal distribution of X is

Pr(X = x) = ∑ Pr(X = x, Y = y)

… = 0.0625 + 0.0625 + 0.0625 + 0.0625

… = 0.25

That is, the first equality follows from the law of total probability, with the sum taken over y from {0, 5, 10, 15}. Each probability Pr(X = x, Y = y) is given in the table to be 0.0625.

Similarly, the marginal distribution of Y is

Pr(Y = y) = 0.25

(b) Yes, they're independent because

Pr(X = x, Y = y) = 0.0625,

and

Pr(X = x) Pr(Y = y) = 0.25 • 0.25 = 0.0625.

E[X] = ∑ x Pr(X = x)

… = 0.25 ∑ x

… = 0.25 (0 + 5 + 10 + 15)

… = 7.5

and you would find the same mean for Y,

E[Y] = 7.5

The variance of X is

V[X] = E[X^2] - E[X]^2

… = (∑ x^2 Pr(X = x)) - 7.5^2

… = 0.25 (∑ x^2) - 56.25

… = 0.25 (0^2 + 5^2 + 10^2 + 15^2) - 56.25

… = 31.25

and similarly,

V[Y] = 31.25

(each sum is taken with x and y from {0, 5, 10, 15})

7 0

3 years ago

Use factoring to solve the quadratic equation. Check by substitution or by using a graphing utility and identifying x-intercepts

MaRussiya [10]

9514 1404 393

Answer:

x = -7, x = 9

Step-by-step explanation:

We presume your equation is ...

x² -2x -63 = 0

Factors of -63 that have a sum of -2 are -9 and +7. Then the factored equation is ...

(x -9)(x +7) = 0

Solutions make the factors zero.

x -9 = 0 ⇒ x = 9

x +7 = 0 ⇒ x = -7

The solutions to the quadratic equation are x = -7 and x = 9.

7 0

2 years ago

2.) Tyler has a baseball bat that weighs 44 ounces. Find this weight in

ra1l [238]

Answer:

1.9 Kilograms.

Step-by-step explanation

To find the total, subtract 35 and 44, that equals 9. so take 35 from 44, Thats 1 kilo, plus the 9 extra. 1.9 Kilos

8 0

3 years ago

Read 2 more answers

Xanthe and Sarah do some fundraising for their local nursing home. Together they raised $$$302. If Xanthe raised $$$102 more tha

Dimas [21]

Given :

Xanthe and Sarah together raised $302 .

If Xanthe raised $102 more than Sarah .

To Find :

The amount raised by Sarah .

Solution :

Let , amount raise by Sarah is x .

So , by the relation given , price raised by Xanthe is 102 + x .

Now , sum of their amount raised is :

$x+(x+102)=302\\\\2x=302-102\\\\x=\$100$

Therefore , the amount raised by Sarah is $100 .

Hence , this is the required solution .

6 0

3 years ago