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Veronika [31]
3 years ago
9

4x + 3y = 16 7x+6y=31 O A. (1,3) B. (1.4) C. (4,0) OD. (4,3) SUBMIT

Mathematics
1 answer:
klasskru [66]3 years ago
4 0

Answer:

B

Step-by-step explanation:

Given the 2 equations

4x + 3y = 16 → (1)

7x + 6y = 31 → (2)

Multiplying (1) by - 2 and adding to (2) will eliminate the term in y

- 8x - 6y = - 32 → (3)

Add (2) and (3) term by term

- x = - 1 ( multiply both sides by - 1 )

x = 1

Substitute x = 1 in either of the 2 equations and solve for y

Substituting in (1)

4(1) + 3y = 16

4 + 3y = 16 ( subtract 4 from both sides )

3y = 12 ( divide both sides by 3 )

y = 4

Solution is (1, 4 ) → B

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(GIVING BRAINLYIST) 4 ÷ 1/2 YOU HAVE TO show your work on paper using fraction models!
Rashid [163]

Answer:

8

Step-by-step explanation:

so my school uses the method called kcf (keep change flip)

keep the 4

change the division sign to a multiplication sign

flip 1/2 to 2/1

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7 0
2 years ago
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About 7​% of the population of a large country is math phobic. If two people are randomly​ selected, what is the probability bot
ss7ja [257]

Answer:

What is the probability both are math phobic​? 0.49%

What is the probability at least one is math phobic​? 9.31%

Step-by-step explanation:

In order to both be math phobic, both individuals has to be inside of the probability of 7%, that means 0.07*0.07 = 0.0049 = 0.49%

In order to at least one be math phobic there's some cases which satisfies the sentence:

Individual A is math phobic and B as well = 0.07*0.07 = 0.0049 = 0.49%

Individual A is math phobic, but B is not = 0.07*0.63 = 0.0441 = 4.41%

Individual A is not, but B is math phobic = 0.63*0.07 = 0.0441 = 4.41%

Suming the 3 possibles cases, the probability at least one is math phobic​

= 9.31%

7 0
3 years ago
What is 18 % of 120?<br> O 2. 160<br> O 666<br> 0 21.6<br> 0 15
Rina8888 [55]

Multiply 120 by 18%

Change 18% to a decimal: 0.18

120 x 0.18 = 21.6

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8 0
3 years ago
In terms of x? pls solve and show your work! Will give u brainliest!
weeeeeb [17]

Answer:

\sqrt{ {x}^{2} - 1 }

Solution,

base=1

perpendicular=?

hypotenuse=X

now,

using Pythagoras theorem,

x^2=p^2+b^2

or, x^2=p^2+1^2

or,p^2=x^2-1

or, p=√x^2-1

tan theta=perpendicular/ base

tan theta =√x^2-1/1

tan theta=√x^2-1

z=tan theta

z=√x^2-1

Hope this helps...

Good luck on your assignment..

8 0
3 years ago
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A sphere has a volume of approximately 24,416.64 cubic inches (using 3.14 for ).
Masteriza [31]

Answer:

diameter = 36 in.

Step-by-step explanation:

V = 4π r^3/3

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73249.92 = 12.56 r^3

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4 0
3 years ago
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