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3 years ago

Solve by substitution: 7x+4y=14 and x+2y=12 HURRY I'LL GIVE BRAINLIEST!!

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

5 0

Answer:

x = -2

y = 7

Step-by-step explanation:

x = 12 - 2y

7(12 - 2y) + 4y = 14

84 - 14y + 4y = 14

84 - 10y = 14

10y = 70

y = 7

x = 12 - 2 x 7

x = 12 - 14

x = -2

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The segments shown below could form a triangle. o O A. True C B Fase

levacccp [35]

Answer:

False

Step-by-step explanation:

The sum of the smaller two sides must be larger than the third side

8+7 > 15

15 >15

This is not true so the three sides cannot form a triangle

7 0

4 years ago

10. The coordinates of C and D are 4 and -28 respectively, and F mdpt CD. Solve for:

Zigmanuir [339]

Answer:

a) mCD=7

b) mCF=7

c) mFD=7

d) F(2,-14)

Step-by-step explanation:

Let the coordinates of C and D be (4,0) and (0,-28) respectively and F is the midpoint of CD

a) mCD

Slope formula

$m= \frac{y_2-y_1}{x_2-x_1}$

$m= \frac{-28-0}{0-4}$

$m= \frac{-28}{-4}$

$m= 7$

mCD=7

b) mCF

mCF=mCD

Hence mCF=7

c) mFD

mFD=mCD

Hence mFD=7

d) Coordinates of F : mid point formula

Mid points Formula

$x= \frac{x_2+x_1}{2}$

$x= \frac{0+4}{2}=\frac{0+4}{2}=2$

$y= \frac{y_2+y_1}{2}=\frac{-28+0}{2}=\frac{-28}{2}=-14$

coordinates of F are (2,-14)

5 0

3 years ago

Find the missing value. sin x = .65

mote1985 [20]

Remark
This is just a calculator problem. Look around on your calculator for the sin button

Above it you will find something like sin-1. that will give you the answer.

Here's how you do it with most calculators.
2nd F
Sin-1(
0.65
=
You should get 40.54 <<<<<<<< answer

7 0

3 years ago

Will mark brainliest for any help!

elena55 [62]

Answer:

5000

Step-by-step explanation:

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3 years ago

1. Simplify 3(2x + 5) 6x + 30 0 6x +15 16x + 5

inysia [295]

Answer:

6x+15

Step-by-step explanation:

3×2x + 3×5. use the distributive property of multiplication

4 0

3 years ago