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stranger123
04.09.2019 •
Mathematics
Find an equation of the line passing through the point (-4,6) that is perpendicular to the line y=7/2x+5. work .
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Ответ:
y =
x + 4![\frac{6}{7}](/tpl/images/0222/8348/f36a0.png)
Step-by-step explanation:
We are to find the equation of line 1 which passes through point (-4,6)
Line 1 is perpendicular to line 2.
The equation of line 2 is; y =
x + 5
The slope of line 2 is![\frac{7}{2}](/tpl/images/0222/8348/447a9.png)
Because the product of two perpendicular line is -1;
The slope of line 1 is -1 ÷
= ![\frac{-2}{7}](/tpl/images/0222/8348/bfee0.png)
Taking another point (x,y) on line 1;
Slope = change in y ÷ change in x
y - 6 =
(x + 4)
y - 6 =
x - ![\frac{8}{7}](/tpl/images/0222/8348/23c15.png)
y =
-
+ 6
y =
x + 4![\frac{6}{7}](/tpl/images/0222/8348/f36a0.png)
Ответ:
A.Greg will need mixed 2 cups of yellow paint with each cup of blue paint.
B.
cup of blue paint
C.$9
Step-by-step explanation:
We are given that the ratio of the number of cups of yellow paint to the number of cups of blue paint that Greg mixed to make a shade of green paint is 2:1
A.
Ratio of number of cups of yellow paint to the number of cups of blue paint=2:1
Number of cups of yellow paint =2
Number of blue paint=1
It means Greg will need 2 cups of yellow paint mixed with each cup of blue paint.
B.2 cup of yellow paint need cup of blue paint =1
1 cup of yellow paint need cup of blue paint=![\frac{1}{2}](/tpl/images/0426/6541/9cdae.png)
Hence, the number of blue cups is
should Greg add to each cup of yellow paint to make the shade of green.
C.If Greg purchased number of cups of yellow paint =6
Cos of 6 cup=$54
Cost of each cup =
$9
Hence, the unit price per cup of yellow paint is $9.