3 years ago

4x+7y=8.77 8x+14y=15.80

1 answer:

8 0

If i times the first equation by -2 that gives me -8x-14y=-17.54 8x+14y=15.80 Everything cancels out and I'm left with -1.74

You might be interested in

Mosab plans a trip to visit his grandparents. The online directions show four possible routes. He wants to get there as quickly

ElenaW [278]

Is there any graphs ? can you mark me as brainlist :)?

6 0

3 years ago

The wind speed s (in miles per hour) is related to the distance (in miles) the tornado travels by the equation s = 93log d + 65.

Vesnalui [34]

Answer:

The distance the tornado traveled was approximately 205 miles.

Step-by-step explanation:

The equation representing the relationship between the wind speed (in miles per hour) and the distance the tornado travels (in miles) is:

$s=93\log d+65$

Compute the value of <em>d</em> for <em>s</em> = 280 as follows:

$s=93\log d+65$

$280=93\log d+65$

$93\log d=280-65\\93\log d=215$

$\log d=2.312\\$

$d=10^{2.312}\\d=205.035\\d\approx 205$

Thus, the distance the tornado traveled was approximately 205 miles.

7 0

3 years ago

BRAINLIEST!! If the area of ABC is D, give the expressions that complete the equation for the measure of angle C

kati45 [8]

Answer: m= 1+3

Step-by-step explanation:

Basic math helps.

This is geometry.

Yes.

if you add a you get b.

hope this helps, anytime.

4 0

2 years ago

What is the initial value of the equation shown?

Ksju [112]

Answer:

Y = 2

Step-by-step explanation:

if you were looking for y's value

3 0

2 years ago

Miguel invests money in an account paying simple interest. He invests $170 and no money is added or removed from the investment.

stiv31 [10]

$~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\dotfill & \$185.30\\ P=\textit{original amount deposited}\dotfill & \$170\\ r=rate\to r\%\to \frac{r}{100}\\ t=years\dotfill &1 \end{cases} \\\\\\ 185.30=170[1+(\frac{r}{100})(1)]\implies \cfrac{185.30}{170}=1+\cfrac{r}{100}\implies \cfrac{109}{100}=\cfrac{100+r}{100} \\\\\\ 109=100+r\implies \stackrel{\%}{9}=r$

7 0

2 years ago