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3 years ago

PLEASE HELP‼️‼️ILL MARK BRAINLYEST ‼️‼️I MEAN IT PLEASE ‼️‼️‼️‼️‼️‼️‼️15 POINTS PLEASE ‼️‼️

Mathematics

1 answer:

adell [148]3 years ago

8 0

Answer:

1. Yes; 2. Yes ; 3. No; 4. Yes

Step-by-step explanation:

The proportion will have to be read the same way. For example top Δ bottom to the lower Δ bottom (locate in the same place)

14/21 = 6 /9 Yes because the top Δ bottom to lower Δ bottom = top side to

lower same side

13.5/21 = 9/ 14 Yes because the same two sides to the same two sides in

the lower Δ

9/13.5 = 6 21 No because top Δ side to lower Δ same location but the

second one top Δ side to the lower bottom

14 /6 = 21/6 Yes because top Δ bottom to top side = lower Δ bottom to

lower side (in the same place)

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If you add 2 cubes of sugar to a 6 ounce cup of tea and 3 cubes of sugar to a 9 ounce cup of tea, which one is sweeter?

Hoochie [10]

Answer:

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

You can wash a car 1.5 times as fast as your friend. Working together, the two of you can wash 1 car in 6 minutes. How long does

faltersainse [42]

If the two of you can wash 1 car in 6 minutes:

It will take you 10 minutes to wash the car alone

take your friend 15 minutes to wash the car alone

Let the duration you can work be represented by y

Let the duration your friend can work be represented by x

You can wash a car 1.5 times as fast as your friend

That is, y = 1.5x

Working together, the two of you can wash 1 car in 6 minutes

This can be represented by the equation

$\frac{1}{x}+\frac{1}{y} = \frac{1}{6}$

Substitute x = 1.5y into the equation above

$\frac{1}{1.5y}+\frac{1}{y} = \frac{1}{6}\\\\\frac{1+1.5}{1.5y} = \frac{1}{6}\\\\\frac{2.5}{1.5y} = \frac{1}{6}\\\\1.5y=2.5(6)\\\\1.5y=15\\\\y=\frac{15}{1.5} \\\\y=10$

It will take you 10 minutes to wash the car alone

Substitute y = 10 into x = 1.5y

x = 1.5(10)

x = 15 minutes

It will take your friend 15 minutes to wash the car alone

Learn more here: brainly.com/question/25547756

7 0

3 years ago

Sequences of Transformations

gogolik [260]

así que si usted toma el número sesenta dos entonces se obtiene cuarenta y seis

3 0

3 years ago

Help me on this problem

nalin [4]

Given:
Bolt of fabric = 14 3/8 yards
length of fabric per skirt = 2 1/2 yards

Convert mixed fractions into improper fractions.

14 3/8 ⇒ (14*8)+3/8 = 115/8
2 1/2 ⇒ (2*2)+1/2 = 5/2

115/8 ÷ 5/2

115/8 * 2/5 = 115*2 / 8*5 = 230 / 40
230/40 = 5.75

5 whole skirt

5/2 * 5 = 25/2 length of fabric used to make 5 skirts.

115/8 - 25/2 = 115/8 - (25/2 * 4/4) = 115/8 - 100/8 = 15/8 length of excess fabric

15/8 = 1 7/8 yards of fabric will be left.

3 0

4 years ago

A consensus forecast is the average of a large number of individual analysts' forecasts. Suppose the individual forecasts for a

zaharov [31]

Answer:

a) $P(X>3.5)=P(\frac{X-\mu}{\sigma}>\frac{3.5-\mu}{\sigma})=P(Z>\frac{3.5-5}{1.2})=P(z>-1.25)$

And we can find this probability using the complement rule:

$P(z>-1.25)=1-P(z$

b) $P(X$

And we can find this probability uing the normal standard table:

$P(z$

c) $P(3.5$

And we can find this probability with this difference:

$P(-1.25$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(-1.25$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part a

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

$X \sim N(5,1.2)$