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3 years ago

-5x +4 - 4x = 40 please help me answer it

Mathematics

2 answers:

ASHA 777 [7]3 years ago

3 0

Answer:

The answer is X= -4

Gnoma [55]3 years ago

3 0

Answer:

x=-4

Step-by-step explanation:

-5x+4-4x=40

-9x+4=40

-4| -4

-9x=36

/-9 | /-9

x=(-4)

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4 years ago

Solve i = Prt for t given that P=300, r=7% and I =105 solve for t

vova2212 [387]

I think it was the same number

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3 years ago

What equation in slope intercept form represents the line that passes through the two points? (5, 6), (9, –2)

timofeeve [1]

First find slope
(-2-6)/(9-5) = -8/4 = -2
Y = -2x + b
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Solution: D

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3 years ago

The table shows a proportional relationship between the number of pounds of bananas purchased and the total cost of bananas.

Liula [17]

Answer:

Choice A, C and E

Step-by-step explanation:

Your table is poorly presented

Given

x y

$\begin{array}{cc} {3} & {1.47} \ \\ {5} & {2.45} \ \\ {9} & {4.41} \ \ \end{array}$

First, we calculate the constant of proportionality (k)

$k = \frac{y}{x}$

For (3,1.47)

$k = \frac{1.47}{3}$

$k = 0.49$

For (5,2.45)

$k = \frac{2.45}{5}$

$k = 0.49$

For (9,4.41)

$k = \frac{4.41}{9}$

$k = 0.49$

From the above calculations, the constant of proportionality is 0.49.

So, the usable rows must also have 0.49 as their constant of proportionality

Choice A

$(x,y) = (2,0.98)$

$k = \frac{0.98}{2}$

$k = 0.49$ --- This is usable

Choice B

$(x,y) = (7,4.45)$

$k = \frac{4.45}{7}$

$k = 0.64$ --- This is not usable

Choice C

$(x,y) = (6,2.94)$

$k = \frac{2.94}{6}$

$k = 0.49$ --- This is usable

Choice D

$(x,y) = (1,0.54)$

$k = \frac{0.54}{1}$

$k = 0.54$ ---- This is not usable

Choice E

$(x,y) = (8,3.92)$

$k = \frac{3.92}{8}$

$k = 0.49$ --- This is usable

5 0

3 years ago

One more than four times a number b is 17

Alinara [238K]

i guess i got the answer ...

well..... four times a number b = 4×b = 4b

one more than is +1

and this = 17

now we need to put it all together and forma an equation .... so .. it will be

4b + 1 = 17

4b = 17 - 1

4b = 16

b = 16/4

∴ b = 4

6 0

4 years ago

Read 2 more answers