3 years ago

Help with them please

Mathematics

1 answer:

Free_Kalibri [48]3 years ago

5 0

Answer for the first question:

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Need help with this question

kicyunya [14]

The equation of the line that passes through the points (2,1) and (5,-8) is

y = -3x + 7

6 0

3 years ago

A glass is

N76 [4]

Answer:

135ml

Step-by-step explanation:

glass originally 4/12 full

it then became 9/12 full

therefore 75ml = 5/12

75/5= 15ml per 1/12

15x9= 135ml total

5 0

3 years ago

What is the value of the expression -78-a, when a= -29?

Lady bird [3.3K]

ANSWER:
-78-a
= -78-(-29)
= -78+29
= -49

3 0

3 years ago

Read 2 more answers

Find the constant $a$ such that\[(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28.\]

Colt1911 [192]

The value of constant a is -5

Further explanation:

We will use the comparison of co-efficient method for finding the value of a

So,

Given

$(x^2 - 3x + 4)(2x^2 +ax + 7)\\= x^2((2x^2 +ax + 7)-3x((2x^2 +ax + 7)+4(2x^2 +ax + 7)\\= 2x^4+ax^3+7x^2-6x^3-3ax^2-21x+8x^2+4ax+28\\Combining\ alike\ terms\\=2x^4+ax^3-6x^3+7x^2-3ax^2+8x^2-21x+4ax+28\\= 2x^4 +(a-6)x^3+(15-3a)x^2-(21-4a)x+28\\$

As it is given that

(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28

In this case, co-efficient of variables will be equal, so we can compare the coefficients of x^3, x^2 or x

Comparing coefficient of x^3

$a-6 = -11\\a = -11+6\\a = -5$

So the value of constant a is -5

Keywords: Polynomials, factorization

Learn more about factorization at:

#LearnwithBrainly

4 0

3 years ago

Abd and cbe are vertical angles, given that abd=13y-25 mcbe=5x+79 what is the value of x?

astraxan [27]

Answer:

-15.8

Step-by-step explanation:

7 0

3 years ago