3 years ago

Solve the following system by elimination: 4x+3y=2 5x + 4y = 3

Mathematics

1 answer:

MAXImum [283]3 years ago

5 0

Answer:

5x+4y=3

- 4x+3y=2

-----------------

x+y=1

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Can someone please help?

castortr0y [4]

B- They are always congruent. Congruent means in agreement or harmony. But in this case, identical in form. Parallelograms are parallel on both sides, which makes them have congruent sides.
P.S.- This is elementary level, no offense.

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3 years ago

In a geometric sequence, a2=108 and as 256. Write the explicit formula for this sequence.

torisob [31]

Answer:

The first choice is correct.

Step-by-step explanation:

First work out the common ratio r:-

a2 = a1r and a5 = a1 r^4

So r^3 = a1r^4 / a1r = 256/ 108

r = cube root (256/-108) = 4/3

So the explicit formula is 108(4/3)^(n-1)

8 0

3 years ago

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nika2105 [10]

18: 15+2+1=18

18: 12+3+3=18

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3 years ago

What is the value of x in the product of powers below? 6*9 × 6x = 6² (all exponents)

anyanavicka [17]

The answer is -7 i think

4 0

3 years ago

1-5 Skills Practice

Ivahew [28]

Answer:

The least number of questions a student can answer correctly is 32

Step-by-step explanation:

Let

x -----> the number of questions answered correctly

y ----> the total number of questions on a test

$ratio=\frac{x}{y}$

we know that

For a student to earn and A or B on a test, the ratio must be greater than or equal to 0.8

$\frac{x}{y} \geq 0.8$

For y=40 questions

Find the value of x

substitute

$\frac{x}{40} \geq 0.8$

solve for x

Multiply both sides by 40

$x \geq 0.8(40)$

$x \geq 32$

The least number of questions a student can answer correctly is 32

<u><em>Verify the ratio</em></u>

For x=32, y=40

$\frac{32}{40}=0.8$

Compare

$0.8 \geq 0.8$ ----> is ok

7 0

3 years ago