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3 years ago

PLZ HELP ME

Mathematics

1 answer:

iVinArrow [24]3 years ago

7 0

Answer:

y=-1x+8

Step-by-step explanation:

y=mx+b

m=slope

b=y-intercept

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Need help ()()()()()((;(;

Gwar [14]

Answer:

20%

Step-by-step explanation:

4/20 = x/100

100*4 =400

400/20 = 20

4/20 = 20/100

8 0

3 years ago

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Please help, I don’t really understand how to do this at all.

Alisiya [41]

Answer:

i don't know exactly.

Step-by-step explanation:

but the might be an angle tool online.

5 0

2 years ago

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Factorize 2a^2+7a-15

loris [4]

$\huge\bf \pink {\underline{Solution :-}}$

$2 {a}^{2} + 7a - 15$

$= 2 {a}^{2} + 10a - 3a - 15$

$= 2a(a + 5) - 3(a + 5)$

$= (a + 5)(2a - 3)$

$\sf \red{Hence, Answer \: is \: (a + 5)(2a - 3).}$

$\\$

$\bf \purple{ \underline{ Important \: Formulas \: for \: Factorization :-}}$

$• \: {a}^{2} + 2ab + {b}^{2} = {(a + b)}^{2}$

$• \: (a + b)(a - b) = {a}^{2} - {b}^{2}$

$• \: {a}^{2} - 2 ab + {b}^{2} = {(a - b)}^{2}$

$• \: {a}^{3} + 3 {a}^{2} b + 3a {b}^{2} + {b}^{3} = {(a + b)}^{3}$

$• \: {a}^{3} - 3 {a}^{2} b + 3a {b}^{2} - {b}^{3} = {(a - b)}^{3}$

$• \: {(a + b)}^{2} + {(a - b)}^{2} = 2( {a}^{2} + {b}^{2} )$

$• \: {(a + b)}^{2} - {(a - b)}^{2} = 4ab$

$• \: (a + b)( {a}^{2} -ab + {b}^{2} ) = {a}^{3} + {b}^{3}$

$• \: (a - b)( {a}^{2} + ab + {b}^{2} ) = {a}^{3} - {b}^{3}$

$• \: {( \frac{a + b}{2} )}^{2} - ( {\frac{a - b}{2} } )^{2} = ab$

5 0

3 years ago

Read 2 more answers

Find the lateral area

Dahasolnce [82]

Answer:

228

Step-by-step explanation:

3 0

3 years ago

Some people believe that second born subjects are more intelligent (higher IQ test). Given the data, your job is to perform the

nexus9112 [7]

Answer:

Step-by-step explanation:

When to use regression test?

This is done to find the relationship between 2 variables. One dependent and one independent.

When to use Multiple regression test?

Extension of regression test. It is used to predict value of 1 variable when it depends on 2-3 other variables. Multivariable, basically.

When to use 1-sided t-test?

We check for possibility of relationship of something from one side. 1 side effect. With a hypothesis and its alternate.

When to use 2-sided t-test?

This is same as 1-tailed but it looks for possibility from 2sides. A hypothesis and alternate, whether less or more.

Now, Options A and B are not right since we aren't comparing 2 variables here. People believe second born subjects are more intelligent. We have to perform a test to see whether this is true or not. One sided answer. So, we will use One-sided t-test.

6 0

3 years ago