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3 years ago

Use properties to find 4 times 23 times 25

Mathematics

2 answers:

erastova [34]3 years ago

8 0

The answer to the problem is 2300

mamaluj [8]3 years ago

6 0

Answer:

2300

Step-by-step explanation:

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What are the first five terms of a= 2 × n<br>

kenny6666 [7]

Answer:

Step-by-step explanation:

To find the first 5 terms we can substitute numbers for "n"

We can create a table:

x y

1 2

2 4

3 6

4 8

5 10

To get the values we just plug in numbers:

a(1)=2(n)

a(1)=2(1)

a(1)=2

a(2)=2(2)

a(2)=4

...... etc.

6 0

3 years ago

A recent poll of 1500 new home buyers found that 60% hired a moving company to help them move to their new home. Find the margin

Mrac [35]

Answer:

The margin of error M.O.E = 2.5%

Step-by-step explanation:

Given that;

The sample size = 1500

The sample proportion $\hat p$ = 0.60

Confidencce interval = 0.95

The level of significance ∝ = 1 - C.I

= 1 - 0.95

= 0.05

The critical value:

$Z_{\alpha/2} = Z_{0.05/2} \\ \\ Z_{0.025} = 1.96$ (From the z tables)

The margin of error is calculated by using the formula:

$M.O.E = Z_{\alpha/2} \times \sqrt{\dfrac{\hat p(1 -\hat p)}{n}}$

$M.O.E = 1.96 \times \sqrt{\dfrac{\hat 0.60(1 -0.60)}{1500}}$

$M.O.E = 1.96 \times \sqrt{\dfrac{0.24}{1500}}$

$M.O.E = 1.96 \times \sqrt{1.6 \times 10^{-4}}$

M.O.E = 0.02479

M.O.E ≅ 0.025

The margin of error M.O.E = 2.5%

8 0

3 years ago

The value of y is directly proportional to the value of x. If y=54 when x=18, which is the value of y when x=48?

Oxana [17]

Answer:

Step-by-step explanation:

$\frac{18}{54}= \frac{x}{48} \\\\x=16$

6 0

3 years ago

A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 5 large boxes and 2 small boxes has a t

nikdorinn [45]

Each large box weighs 15 kilograms and each small box weighs 13.5 kilograms.

Step-by-step explanation:

Let,

Weight of large box = x

Weight of small box = y

According to given statement;

5x+2y=102 Eqn 1

3x+8y=153 Eqn 2

Multiyplying Eqn 1 by 4

$4(5x+2y=102)\\20x+8y=408\ \ \ Eqn\ 3$

Subtracting Eqn 2 from Eqn 3

$(20x+8y)-(3x+8y)=408-153\\20x+8y-3x-8y=255\\17x=255$

Dividing both sides by 17

$\frac{17x}{17}=\frac{255}{17}\\x=15$

Putting x=15 in Eqn 2

$15(3)+8y=153\\45+8y=153\\8y=153-45\\8y=108$

Dividing both sides by 8

$\frac{8y}{8}=\frac{108}{8}\\y=13.5$

Each large box weighs 15 kilograms and each small box weighs 13.5 kilograms.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

4 0

4 years ago

Which ones are true !!!!?????

MAXImum [283]

Answer:

both If's and a b

Step-by-step explanation:

I don't know for sure

7 0

2 years ago