3 years ago

3a-2b=14. 3a+2b=28..

Mathematics

1 answer:

GaryK [48]3 years ago

7 0

Answer:

a = 7

b = 3 1/2

Step-by-step explanation:

if you add the equations together then the 'b' will zero out

6a = 42

a = 7

substitute 7 for 'a' to solve for 'b'

3(7) - 2b = 14

21 - 2b = 14

-2b = -7

b = 7/2 or 3 1/2

You might be interested in

Questions are cool.

Zarrin [17]

Answer:

the answer to this question is 785

5 0

3 years ago

The two triangles above are similar.

melisa1 [442]

Two similar angles is shown in the diagram below

Similar shapes have same angle and their side in proportion

Correct description is option c)

4 0

4 years ago

Please help my sister has da struggles

Lyrx [107]

Answer: $200.

Step-by-step explanation: one tenth is just 1÷10, which is .1. Multiplying $2000 by .1 answers to $200.

7 0

3 years ago

Una paid $2.14 for a notebook. She gave the cashier a $5 bill.<br> How much change did she receive?

Blizzard [7]

Answer:

$2.86 thats how much sh gets back

6 0

4 years ago

Read 2 more answers

the scientist's collection that has granite that weighs 74 26/36 lbs, marble that weighs 63 16/34 lbs, and quartz that weighs 81

Viktor [21]

Answer:

(D)6 1/2 lbs

Step-by-step explanation:

$\text{Weight of the quartz = }81 \dfrac{9}{40} \text{ lbs}\\\dfrac{9}{40}=0.225 \\$Therefore:$ 81 \dfrac{9}{40} \approx 81.25\text{ lbs (to the nearest 1/4 lbs)}\\\text{Weight of the granite = }74 \dfrac{26}{36} \text{ lbs}\\ \dfrac{26}{36}=0.722 \\$Therefore:$74 \dfrac{26}{36} \approx 74.75\text{ lbs (to the nearest 1/4 lbs)}$

Difference = 81.25 - 74.75

=6.5 lbs

The correct option is D.

8 0

4 years ago

3a-2b=14. 3a+2b=28..​

3a-2b=14. 3a+2b=28..