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3 years ago

Find x if f(x) = 2x + 7 and f(x) = -1.A. -4. B. -3. C. 5.

Mathematics

2 answers:

padilas [110]3 years ago

6 0

Answer:

A. -4

Step-by-step explanation:

Set equations equal to each other.

2x+7=-1

Subtract 7 from both sides.

2x = -8

Divide both sides by 2.

x = -4

Maurinko [17]3 years ago

5 0

X=-4 bc step by step

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PLEASE HELP!!

Anestetic [448]

Answer:

answer in explanation

Step-by-step explanation:

1) y=4x-7

2) y=-2x

3) -4

4) -5

6 0

3 years ago

Show that <br><br> 4(m + 7) + (m + 3)^2 = (m + 3)(m + 7) + 16

anygoal [31]

Step-by-step explanation:

$4(m+7)+(m+3)^2=(m+3)(m+7)+16\\\\L_S=4(m+7)+(m+3)^2\\\\\text{use the distributive property}:a(b+c)=ab+ac\\\text{and formula}:\ (a+b)^2=a^2+2ab+b^2\\\\L_S=(4)(m)+(4)(7)+m^2+2(m)(3)+3^2\\\\L_S=4m+28+m^2+6m+9\qquad\text{combine like terms}\\\\L_S=m^2+(4m+6m)+(28+9)\\\\L_S=m^2+10m+37$

$R_S=(m+3)(m+7)+16\\\\\text{use FOIL}:(a+b)(c+d)=ac+ad+bc+bd\\\\R_S=(m)(m)+(m)(7)+(3)(m)+(3)(7)+16\\\\R_S=m^2+7m+3m+21+16\qquad\text{combine like terms}\\\\R_S=m^2+(7m+3m)+(21+16)\\\\R_S=m^2+10m+37\\\\\boxed{L_S=R_S}$

4 0

3 years ago

Please help i need to find the constant of proportionality

abruzzese [7]

Answer:

Step-by-step explanation:

y = 4*x

y = 4*1.5 = 6

y = 4*2.25 = 9

y = 4* 3.25 = 13

3 0

2 years ago

You decided to put the 94 lollipops on sale.if you charge 70cents and put them on sale for buy one,get one free,will you be char

Svet_ta [14]

$0.70 for 2 lollipops
X for 94 lollipops
So, 2X=94*0.70
X= (94*0.70)/2 = 65.8/2
X= $32.9
The answer is YES. They are charging enough money to get $32.90 after selling 94 lollipops on sale for buy one and get one for free.

8 0

3 years ago

Use The four step process to find the slope of the tangent line to the graph of the given function at any point. ( simplify your

hodyreva [135]

Answer:

The answer to your question is: 16x + 3

Step-by-step explanation:

Step 1 : f(x) = 8x² + 3x

f(x +h) = 8(x + h)² + 3( x + h)

f(x + h) = 8( x² + 2xh + h²) + 3( x + h)

f (x + h) = 8x² + 16xh + 8h² + 3x + 3h

Step 2 f(x+h) - f(x) = 8x² + 16xh + 8h² + 3x + 3h - ( 8x² + 3x)

= 8x² + 16xh + 8h² + 3x + 3h - 8x² -3x

= 16xh + 8h² + 3 h

Step 3 f(x + h) - f(x)/ h = h(16x + 8h + 3) /h

= 16x + 8h + 3

Step 4 lim f(x + h) - f(x)/ h = lim 16x + 8h + 3 = lim 16x + 8(0) + 3 = 16x + 3

h ⇒0 h ⇒0 h ⇒0

3 0

3 years ago

Find x if f(x) = 2x + 7 and f(x) = -1.A. -4. B. -3. C. 5.​

Find x if f(x) = 2x + 7 and f(x) = -1.A. -4. B. -3. C. 5.