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3 years ago

7(m+-13)=-42 (Solve for m) Please help

Mathematics

2 answers:

Contact [7]3 years ago

5 0

Answer:

m=7

Step-by-step explanation:

Replace all occurrences of + − with a single -. A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because 1⋅ − 1 = − 1

7(m-13)=-42

Divide each term by 7 and simplify.

m-13=-6

Move all terms not containing m to the right side of the equation.

m=7

Hope this helps!

Plz mark brainiest! =D

mafiozo [28]3 years ago

4 0

7(m+-13)=-42
(m+-13)=-42-7
(m+-13)=-49
m=-49+13
m=-36

i don't know if this correct or not

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5 0

4 years ago

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Besties this is 100 points & i'll give brainliest istg i need to know this

diamong [38]

Answer:

$\displaystyle b = - 14$

$\displaystyle c = - 54$

Step-by-step explanation:

to figure out b we can consider the following formula:

$\displaystyle \frac{ - b}{2a} = h$

the form of vertex coordinate given by

$\displaystyle (h,k)$

so according to the question

$\displaystyle (h,k) = ( - 7, - 5)$

by order pair we obtain:

$\displaystyle h = - 7, k = - 5$

now substitute the value of h and a to the formula:

$\displaystyle \frac{ - b}{2(- 1)} = - 7$

simplify multiplication:

$\displaystyle \frac{ - b}{ - 2} = - 7$

cross multiplication:

$\displaystyle - b = 14$

divide both sides by -1:

$\displaystyle b = - 14$

now we need to figure out C to do so substitute -7 for x and -5 for y which yields:

$\displaystyle - {7}^{2} - 14( - 7) + c = - 5$

simplify square:

$\displaystyle -49 - 14( - 7) + c = - 5$

simplify multiplication:

$\displaystyle -49 + 98+ c = - 5$

simplify addition:

$\displaystyle 49+ c = - 5$

cancel 49 from both sides:

$\displaystyle c = - 54$

hence,

b=-14
C=-54

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4 years ago

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