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7nadin3 [17]
3 years ago
12

Please Please Please help! 

Mathematics
1 answer:
lara [203]3 years ago
4 0
Take the first equation and set it to equal x by subtracting 5y from both sides and multiplying by -1.  Looks like this...

-x + 5y = 1
     -5y      -5y
-x = -5y + 1
-1(-x = -5y + 1)
x = 5y - 1   ... substitute this into the second equation you get.....

2(5y - 1) + 4y = -4   answer is #2
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1. Write the number name and tell the number of 17,874,000
Anit [1.1K]

Answer:

seventeen million, eight hundred seventy-four thousand

Step-by-step explanation:

hope this helps

pls mark brainliest

6 0
1 year ago
To measure a stone face carved on the side of a​ mountain, two sightings 900 feet from the base of the mountain are taken. If th
olga nikolaevna [1]

Answer:

Height of the stone​ face = 66.29 feet

Step-by-step explanation:

Refer the given figure, here we need to find height of the stone​ face,

Height of the stone​ face = CD

CD = AD - AC

In ΔABC we have

             tan31=\frac{AC}{AB}\\\\tan31=\frac{AC}{900}\\\\AC=540.77feet

In ΔABD we have

             tan34=\frac{AD}{AB}\\\\tan34=\frac{AD}{900}\\\\AD=607.06feet

CD = AD - AC = 607.06 - 540.77 = 66.29 feet

Height of the stone​ face = CD = 66.29 feet

7 0
3 years ago
Algebraic expression for 12 divided by t ?
Dimas [21]

Answer:

\frac{12}{t}

Step-by-step explanation:

To write an algebraic expression from words, translate each word into a symbol. Division can be shown with a division sign or a fraction sign. Create a fraction with a 12 in the numerator and the variable t in the denominator.

8 0
3 years ago
Wich expression can be used to find the slope of a line containing the points (-3,2) and (7,-1)
docker41 [41]
A(x_1;\ y_1);\ B(x_2;\ y_2)\\\\\text{The slope:}\ m=\dfrac{y_2-y_1}{x_2-x_1}


\text{We have:}\\(-3;\ 2)\to\ x_1=-3;\ y_1=2\\(7;\ -1)\to x_2=7;\ y_2=-1

\text{substitute}\\\\m=\dfrac{-1-2}{7-(-3)}=\dfrac{-3}{10}=-\dfrac{3}{10}
6 0
3 years ago
Some help me please help me please help me please help me please help me please help me please
alukav5142 [94]
Ok so in order to do that you need a calculator
5 0
3 years ago
Read 2 more answers
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