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irinina [24]
3 years ago
15

Solve the system by the substitution method. 7x + y = -6 7x - 3y = 18

Mathematics
2 answers:
Elodia [21]3 years ago
7 0

Answer:

Stdivise 7 aep-by-step explanation:

Yuri [45]3 years ago
3 0

Answer:

Step-by-step explanation:

7x + y = -6

y = -7x - 6

7x - 3y = 18

7x - 3(-7x - 6) = 18

7x + 21x + 18 = 18

7x + 21x = 18 - 18

28x = 0

x = 0/28

x = 0 <=========

7x + y = -6

7(0) + y = -6

0 + y = -6

y = -6 <==========

solution is : (0,-6)

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Please help asap !!!!!
Natasha2012 [34]

Answer:

<em>XY = 92 units</em>

Step-by-step explanation:

<u>Similar Shapes</u>

Two shapes are similar if all their corresponding side measures are in the same proportion.

The triangles UVW and YVX are similar because their side lengths are in the proportion 1:2, given the tick marks provided in the drawing.

This means that the measure of VX is twice the measure of VW,

The measure of YV is twice the measure of UV

The measure of XY is twice the measure of UW

This last proportion gives the equation:

z + 46 = 2z

Solving for z:

z = 46

Thus, XY = z+46 = 92

XY = 92 units

6 0
3 years ago
A researcher wishes to conduct a study of the color preferences of new car buyers. Suppose that 50%50% of this population prefer
n200080 [17]

Answer:

0.1527

Step-by-step explanation:

Given that a researcher wishes to conduct a study of the color preferences of new car buyers.

Suppose that 50% of this population prefers the color red

15 buyers are randomly selected

Let X be the no of buyers who prefer red.

X has exactly two outcomes red or non red.

Also each buyer is independent of the other

Hence X is binomial with p = 0.5 and n = 15

Required prob =The probability that exactly three-fifths of the buyers would prefer red

= P(X=9)

= 15C9 (0.9)^9 (0.6)^6

=5005(0.0000305)=0.1527

6 0
3 years ago
Please help fast. It’s a test
Reil [10]
Were is the question?
6 0
3 years ago
Read 2 more answers
1. Solve 9a = 27. The solution is a =
Lana71 [14]

Answer: 3

Step-by-step explanation: To solve for A we need to get it by itself by doing the inverse of mulitplication, which is, division. 27/9=3, so a=3.

7 0
2 years ago
Read 2 more answers
Use the following function rule to find f(2).<br> f(x) = 4 + x<br> f(2)=
lesantik [10]
I’m assuming you just substitute 2 in the equation for x:
4 + x = 4 + 2 = 6

Answer = 6
6 0
1 year ago
Read 2 more answers
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