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5 months ago

What is -15 = -5b ?

Mathematics

1 answer:

nirvana33 [79]5 months ago

8 0

$-15=-5b$

To solve this equation you: divide both sides of the equation into -5:

$\begin{gathered} \frac{-15}{-5}=\frac{-5}{-5}b \\ 3=b \end{gathered}$ Then, the solution for the given equation is b=3

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Is this right? you’re supposed to find FH

Rudik [331]

Answer:

FH=7

Step-by-step explanation:

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2 years ago

Find the x-intercepts of f(x) = x2 + 7x + 10.

Andrej [43]

Answer:

x = - 5, x = - 2

Step-by-step explanation:

Given

f(x) = x² + 7x + 10

To find the x- intercepts let f(x) = 0, that is

x² + 7x + 10 = 0 ← in standard form

(x + 2)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

x + 5 = 0 ⇒ x = - 5

The x- intercepts are (- 5, 0) and (- 2, 0 )

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2 years ago

4. If DF = 9x - 39, find EF. Help I’m so confused!!!!

topjm [15]

Answer:

EF =58

Step-by-step explanation:

from the illustration,

EF =DF - DE

given that DF =9x-39 , DE =47 EF=3x +10

substitute them into the formula,

3x +10=9x-39 - 47

solving for x

3x +10 =9x -86

grouping like terms

3x - 9x =-86 -10

-6x=-96

dividing through by -6

 $\frac{ - 6x}{ - 6} = \frac{ - 96}{ - 6}$ 

 $x = \frac{96}{6}$ 

 $x = 16$ 

but EF=3x+10

substitute x=16 into it to get the EF

EF= 3(16)+10

EF=48+10

EF=58

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2 years ago

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Arte-miy333 [17]

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2 years ago

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