3 years ago

X = 2y − 4 7x + 5y = −66

Mathematics

1 answer:

ivolga24 [154]3 years ago

3 0

Answer:

Step-by-step explanation

Substitute 2y-1 for x in the second equation:

7x + 5y = -66

7(2y-4) + 5y = -66

then solve for y:

14y - 28 + 5y = -66

19y = -38

y = -2

Substitute -2 for y in the first equation:

x = 2y - 4

x = 2(-2) - 4

x = -8

The lines intersect at (-8,-2)

You might be interested in

In circle D with mZCDE = 112 and CD = 9 units, find the length of arc CE.

Lady bird [3.3K]

Answer:

CE= 17.59

Step-by-step explanation:

Arc Length=central angle/ 360 (circumference)

CE= 112/ 360 (2π9)

CE= 17.59

5 0

3 years ago

A teacher wants to buy 9 boxes of granola bars for a school trip. Each box usually costs $7, but many grocery stores are having

Novay_Z [31]

Answer:

well I think the question's not complete but if that's the question then 9 boxes would cost about $63 dollars. since some stores have a sale, you should add the word 'about' or 'around' with the answer. hope it was helpful ))

5 0

3 years ago

Mary has $267 in her checking account. She writes three checks for $33; $65 and $112. What is the balance in her account now? Yo

Tamiku [17]

Answer:$57

Step-by-step explanation:

$267-$33=$234

$234-$65=$169

$169-$112=$57

5 0

3 years ago

An ant has 6 legs. How many legs do 8 ants have

Alexeev081 [22]

If you multiply 6 times 8 there are 48

4 0

3 years ago

Given the line below. Write the point-slope form of the given line that passes through the points (0, 3) and (4, 0). Identify (x

jeka57 [31]

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~{{ 0}} &,&{{ 3}}~) 
% (c,d)
&&(~{{4}} &,&{{ 0}}~)
\end{array}
\\\\\\
% slope = m
slope = {{ m}}\implies 
\cfrac{\stackrel{rise}{{{ y_2}}-{{ y_1}}}}{\stackrel{run}{{{ x_2}}-{{ x_1}}}}\implies \cfrac{0-3}{4-0}\implies -\cfrac{3}{4}
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-3=-\cfrac{3}{4}(x-0)$

4 0

3 years ago