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3 years ago

What is -1/5 + 7/10 equal

Mathematics

1 answer:

monitta3 years ago

8 0

0.5

Explanation—

So when u do 1/5 + 7/10 u get 0.9 and then when u work out the - u get 0.5

Hope this helped

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A box contains four cards: One card is black on both sides, one card is red on both sides and two cards are black on one side an

allochka39001 [22]

Answer:

Step-by-step explanation:

A box contains four cards: One card is black on both sides, one card is red on both sides and two cards are black on one side and red on the other side. One card is selected at random and you can see only one side.i) If the side you see is black, what is the probability that the other side is black?ii) If the side you see is black, what is the probability that the other side is red?

Given that:

Number of cards = 4

x = Black on both sides = 1

y = Red on both sides = 1

z = Black on one side, red on one side = 2

.i) If the side you see is black, what is the probability that the other side is black = b

Probability of black

P(x) = 1/4 ; p(b|x) = 1

P(y) = 1/4 ; p(y|x) =

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2 years ago

24 is 120% of what? Pls help

Bess [88]

Answer:

Step-by-step explanation:

Let $x$ be equal to the number that 24 is 120% of.

$x*1.2=24$

Divide both sides by 1.2 to isolate $x$

$\frac{x*1.2}{1.2} =\frac{24}{1.2}\\x=20$

Therefore, 24 is 120% of 20.

I hope this helps!

8 0

3 years ago

Read 2 more answers

394.6 divided by 9 using compatible numbers to estimate the quotient?

Maru [420]

Round 396.6 to 396, because 396/9=44, making a whole number. Hope this helps!!

5 0

3 years ago

Read 2 more answers

HELP!! please explain how you got the answer too.

nydimaria [60]

Answer:

Point H does lie on the graph y = 4.6x - 7

Step-by-step explanation:

Step 1: Define

y = 4.6x - 7

H(0, -7)

Step 2: Substitute, Evaluate, and Check

-7 = 4.6(0) - 7

-7 = 0 - 7

-7 = -7

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3 years ago

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The SAT Reasoning Test (formerly called the Scholastic Aptitude Test) is perhaps the most widely used standardized test for coll

mihalych1998 [28]

Given Information:

Mean SAT score = μ = 1500

Standard deviation of SAT score = σ = 3 00

Required Information:

Minimum score in the top 10% of this test that qualifies for the scholarship = ?

Answer:

$\bar{x} = 1884\\$

Step-by-step explanation:

What is Normal Distribution?

We are given a Normal Distribution, which is a continuous probability distribution and is symmetrical around the mean. The shape of this distribution is like a bell curve and most of the data is clustered around the mean. The area under this bell shaped curve represents the probability.

We want to find out the minimum score that qualifies for the scholarship by scoring in the top 10% of this test.

$P(X > \bar{x} )= P(Z > \bar{x}) = 0.10\\P(X < \bar{x} )= P(Z < \bar{x}) = 1 - 0.10\\P(X < \bar{x} )= P(Z < \bar{x}) = 0.90\\$

The z-score corresponding to the probability of 0.90 is 1.28 (from the z-table)

$\bar{x} = \mu + z(\sigma) \\\bar{x} = 1500 + 1.28(300)\\\bar{x} = 1500 + 384\\\bar{x} = 1884\\$

Therefore, you need to score 1884 in order to qualify for the scholarship.

How to use z-table?

Step 1:

In the z-table, find the probability value of 0.90 and note down the value of the that row which is 1.2

Step 2:

Then look up at the top of z-table and note down the value of the that column which is 0.08

Step 3:

Finally, note down the intersection of step 1 and step 2 which is 1.28

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3 years ago