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2 years ago

I need help with this one too. X=-1 and y=2; evaluate 10x-3+2xy

Mathematics

1 answer:

ExtremeBDS [4]2 years ago

7 0

Answer:

-17

Step-by-step explanation:

plug in x and y

10(-1)-3+2(-1)(2)

10(-1)= -10

2(-1)(2)= -4

-10-3-4

10+3+4= 17

don't forget the negative -17

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What is the first term and explicit rule for the following geometric sequence? 3. 15,75,375, 1,875

VARVARA [1.3K]

First term: 3

Exiplicit formula:

$3/5*5^n$ or 3x5^n-1

Hope this helps!

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3 years ago

The average (arithmetic mean) of y numbers is x. if 30 is added to the set of numbers, then the average will be x - 5. what is t

Anastasy [175]

Given,

AM of y numbers = x.

Let the sum of y numbers be s.

AM of y numbers = x

$\frac{s}{y} = x$

$s = y*x$

Given, when 30 is added to the y numbers, the AM becomes x - 5.

$\frac{s + 30}{y + 1} = x - 5$

$\frac{y*x + 30}{y +1} = x - 5
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$5y = x - 5 -30 = x - 35
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3 years ago

Multiply. - 4.3 x - 3.2 = _____.

GarryVolchara [31]

The answer is
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3 years ago

Read 2 more answers

A local university wanted to understand what students prefer to eat during finals. They asked 1000 students, "Do you prefer chic

olga55 [171]

Answer:

$P(\text{Pizza}\ |\ \text{Female})=0.225$

Step-by-step explanation:

The two-way frequency table is attached below.

We have to calculate the probability of, a person chosen at random prefers pizza given that they are female, i.e $P(\text{Pizza}\ |\ \text{female})$

This is a conditional probability.

We know that,

$P(A\ |\ B)=\dfrac{P(A\ \cap\ B)}{P(B)}$

So,

$P(\text{Pizza}\ |\ \text{Female})=\dfrac{P(\text{Pizza}\ \cap\ \text{Female)}}{P({\text{Female}})}$

From the table,

$P(\text{Pizza}\ \cap\ \text{Female)}=\dfrac{119}{1000}$

$P({\text{Female}})=\dfrac{530}{1000}$

Putting the values,

$P(\text{Pizza}\ |\ \text{Female})=\dfrac{P(\text{Pizza}\ \cap\ \text{Female)}}{P({\text{Female}})}=\dfrac{\frac{119}{1000}}{\frac{530}{1000}}=0.225$

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3 years ago

How do you determine if polygons are similar?

Vikentia [17]

Answer:

a) corresponding angles of similar polygons are congruent

b) corresponding sides of similar polygons are proportional

c) a triangle is a polygon

Step-by-step explanation:

By <em>definition</em>, similar polygons have congruent corresponding angles and proportional corresponding sides.

A triangle is a polygon, so two triangles will be similar if they have congruent corresponding angles and proportional corresponding sides.

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3 years ago