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2 years ago

10

Whats the x value of the solution to this system of equations x=2y-4 7x+5y=-66

2 answers:

Sav [38]2 years ago

8 0

Answer:

-19/7

Step-by-step explanation:

Likurg_2 [28]2 years ago

5 0

Answer:

x=2y−47x

Step 1: Add 47x to both sides.

x+47x=−47x+2y+47x

48x=2y

Step 2: Divide both sides by 48.

48x

48

=

2y

48

x=

1

24

y

Answer:

x=

1

24

y

Step-by-step explanation:

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Can someone please help?

bonufazy [111]

Answer:

Step-by-step explanation:

8b-4b+8-3=4b+5

4b=-5

b=-5/4=1 1/4

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2 years ago

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What is the slope !!!!!

Ratling [72]

Hello there! Slope is rise/run. The formula for finding slope is y2 - y1/ x2 - x1, meaning that you subtract the first x and y-coordinates from the second x and y-coordinates. We'll use the points (0, 3) and (3, 2) for this case. Plug in the values into the formula to get this:

2 - 3 / 3 - 0

Subtract the values in order to get -1/3. There. The slope of the line is -1/3.

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2 years ago

Let f(x) = (5)^x+1 .Evaluate f (-3) without using a calculator

rewona [7]

Answer:

$f\left(-3\right)=\frac{126}{125}$

Step-by-step explanation:

Given

$f\left(x\right)\:=\:\left(5\right)^x+1$

Putting x = -3 to find f(-3)

$f\left(-3\right)\:=\:\left(5\right)^{\left(-3\right)}+1$

as

$5^{-3}=\frac{1}{125}$ ∵ $\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

so

$f\left(-3\right)=\frac{1}{125}+1$

$\mathrm{Convert\:element\:to\:fraction}:\quad \:1=\frac{1\cdot \:125}{125}$

$f\left(-3\right)=\frac{1\cdot \:\:125}{125}+\frac{1}{125}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$f\left(-3\right)=\frac{1\cdot \:\:125+1}{125}$

$f\left(-3\right)=\frac{126}{125}$ ∵ $1\cdot \:125+1=126$

Thus,

$f\left(-3\right)=\frac{126}{125}$

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3 years ago

A standard city block in Manhattan is a rectangle measuring 80 m by 270 m. A resident wants to get from one corner of a block to

kondor19780726 [428]

Answer:

68.4 meters shorter

Step-by-step explanation:

ok so you want to compare the distance 80 m + 270 m with the diagonal length.

the diagonal length = root ( 80^2 + 270^2 )

diagonal length = root(6400 + 72900)

diagonal = root(79300) =281.602 m

so.

350 - 281.602 = 68.397 meters about 68.4 meters shorter than walking around

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2 years ago

The candle factory made 498 red candles and 204 white candles each day. About how many candles did the factory make in a day alt

stiv31 [10]

Answer:

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Step-by-step explanation:

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2 years ago

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