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3 years ago

15

y=−2x−4 y=3x+3

1 answer:

krok68 [10]3 years ago

8 0

Since there is no question I do not know what is being solved for, but if you’re wondering what the value of x and y equal here’s the explanation.

Set up both equations equal to each other > -2x-4 = 3x+3
Subtract 3 from both sides to get > -2x-7 =3x
Subtract the -2x on both sides to get > -7 = 5x.
Divide both sides by 5 and x = -1.40 or (-1 2/5)

In order to get y value take one of the equation and replace the x in the equation with the value of x you just solved for.
y = -2(-1.4) - 4
multiply the number in the parenthesis and the -2 and you get > y = 2.8 - 4
subtract the two and y = 1.2

x = -1.4 (-1 2/5)
y = 1.2 (1 1/5)

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saveliy_v [14]

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3 years ago

Read 2 more answers

11 millions,8 ten-thousands, 12 hundreds, 10 tens,18 ones, 9 tenths and 14 hundredths. what number am i ?

tamaranim1 [39]

11,081,319.04 is the number.

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3 years ago

Evaluate x + sq root(yz) when x = 3, y = 2, and z = –8.

Alex_Xolod [135]

Just remember $\sqrt{-1} = i$

Sub in the numbers:
$3 + \sqrt{-16} = 3+ \sqrt{16}\sqrt{-1} = 3 + 4i$

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3 years ago

Is 1 5/8 greater than, less than, or equal to 1.6?

tigry1 [53]

Answer:

$1 \frac{5}{8} > 1.6$

Step-by-step explanation:

$1 \frac{5}{8} \: ... \: 1.6$

$\frac{1 \times 8 + 5}{8} \: ... \: 1.6$

$\frac{8 + 5}{8} \: ... \: 1.6$

$\frac{13}{8} \: ... \: 1.6$

$\frac{13}{8} \: ... \: \frac{16}{10}$

$\frac{13 \times 5}{8 \times 5} \: ... \: \frac{16 \times 4}{10 \times 4}$

$\frac{65}{40} \: ... \: \frac{64}{40}$

$\frac{65}{40} > \frac{64}{40}$

#IfWrongPleaseReport

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8 0

3 years ago

The percent of working students increased 21.7% to 8.9%, what was the percent prior to increase

blagie [28]

Answer:

Approximately 7.3%.

Step-by-step explanation:

What is percentage increase?

$\displaystyle \text{Percentage Increase} = \frac{\text{Final Value} - \text{Initial Value}}{\text{Initial Value}} \times 100\%$ .

For this question:

$\text{Percentage Increase} = 21.7\%$ ,
$\text{Final Value} = 8.9\% = 0.089$ , and
$\text{Initial Value}$ needs to be found.

Let $\text{Initial Value} = x$ .

$\displaystyle \frac{0.089 - x}{x} = 0.217$ .

Assume that $x \ne 0$ . Multiply both sides of the equation by $x$ :

$0.089 - x = 0.217x$ .

Add $x$ to both sides of the equation:

$0.089 = (1 + 0.217)x$ .

$\displaystyle x = \frac{0.089}{1 + 0.217} = 0.0731 \approx 7.3\%$ .

In other words, the initial percentage is approximately 7.3%.

4 0

3 years ago