All categories

3 years ago

Follow the directions to solve the system of equations by elimination.

1 answer:

Ber [7]3 years ago

5 0

8x + 7y = 39
4x - 14y = -68

(multiply each term in second equation by -2)

8x + 7y = 39
-8x + 28y = 136

(add both equations)

35y = 175

(divide both sides by 35)

y = 5

(substitute value of y in one of the equations)

8x + 7(5) = 39
8x + 35 = 39
8x = 4
x = 1/2
(x, y) = (1/2, 5)

You might be interested in

!!!!Cosines / sines . Find a and round to the nearest 10th.

nadya68 [22]

I think Erica said I messed this one up. It looks the same. Oh yeah I think this was the one I thought $a=1.8=3\sqrt{2}-\sqrt{6}$ , Answer: 1.8.

Let's do it again.

$\dfrac{a}{\sin(180 - (15+105))}=\dfrac{2}{\sin 105^\circ}$

$a = \dfrac{2 \sin(60)}{\sin 105^\circ}$

$a \approx 1.8$

Yes, same as before.

4 0

4 years ago

Use the diagram to complete the table by matching the Theorem with the angle relationship.

serious [3.7K]

Answer:

The Table with Correct reasons are as follows.

Step-by-step explanation:

The Table with Correct reasons are as follows

Answer Angle Relationship

c. Corresponding Angles ∠ 1 ≅ ∠ 5

d. Same Side Interior ∠ 4 + ∠ 5 = 180

a. Alternate Exterior Angles ∠ 3 ≅ ∠ 6

b. Alternate Interior Angles ∠ 4 ≅ ∠ 5

c. Corresponding Angles ∠ 2 ≅ ∠ 6

6 0

3 years ago

Evan works part time for his father and gets paid $8.25 per hour. He works 4 hours. Then he spends 1/3 of his money on a game. H

lianna [129]

Answer:

$22

Step-by-step explanation:

($8.25x4)x2/3

=33x2/3

=$22

5 0

3 years ago

Read 2 more answers

A new factory is growing fast and hiring a lot of new workers. Every week, the total number of workers doubles in size. If it ta

MAXImum [283]

We know that the number of workers doubles every week.

This implies that the number of workers of the previous week is exactly half of the current one's.

So, it took 11 weeks for the factory to be at half capacity.

3 0

3 years ago

A company sells a container of mixed nuts that is 50% peanuts and another container that is 80% peanuts. How many cups of each m

Vlada [557]

Let n be the amount of 60% peanuts. Then the amount of 12% peanuts is 12-n. So:
.6n+.12(12-n)=.4(12)

.48n+1.44=4.8
.48n=3.36
n=7 cups 60% peanuts
12-n=5 cups 12% peanuts. ☺☺☺☺

4 0

3 years ago