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3 years ago

-4+8(7+×) is equivalent to

Mathematics

1 answer:

Helen [10]3 years ago

7 0

-4+56+8x= 8x+52
8x+1w is the answer

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Use elimination method to solve the silmutaneous equations 2x +3y=1 3x=2y+8 (4marks)

kotegsom [21]

Answer:

2x +3y=1⇒equation 1

3x=2y+8

3x-2y=8⇒equation 2

by elimination method,

2x+3y=1 ×2

3x-2y=8 ×3

4x+6y=2

9x-6y=24

cut 6y and -6y

4x+6y=2

9x-6y=24

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

13x+0=26

13x=26

x=26/13

x=2

substitute x=2 in equation 1

2(2)+3y=1

4+3y=1

3y=1-4

3y=-3

y=-3/3

y=-1

therefore, x=2 and y=-1

hope it helps u!

6 0

3 years ago

Solve each inequality and graph its solution. Can you guys solve all three please. This is do soon so please help!

mart [117]

1-A 2-A 3-B

$- 104 \geqslant - 8b - 8$

put -8 near -104

$- 104 + 8 \geqslant - 8b$

$- 96 \geqslant - 8b$

b will be alone.

$\frac{ - 96}{ - 8} \geqslant \frac{ - 8b}{ - 8}$

$b \geqslant 12$

Answer A

$3m - 7 > - 4$

$3m > - 4 + 7$

$3m > 3$

$\frac{3m}{3} > \frac{3}{3}$

$m > 1$

Answer A

İf

$m \geqslant 1$

The answer would be D

But answer A

$- 4x + 4 > - 16$

$16 + 4 > + 4x$

$20 > 4x$

$\frac{20}{4} > \frac{4x}{4}$

$x < 5$

Answer B

We learnt this way in Turkey.

3 0

3 years ago

Which equation could match the table?

Lesechka [4]

B

y=2(-6)+3=-9
y=2(-3)+3=-3
Y=2(0)+3=3
Y=2(3)+3 =9
Y=2(6)+3=15

3 0

2 years ago

Find the distance between (3, −7) and (4, 1)

m_a_m_a [10]

Answer:sqrt65

Step-by-step explanation:

Distance formula d = \sqrt{(x_2 - x_1)^2 + (y_2-y_1)^2}

7 0

3 years ago

John spent $75 on a shopping trip for new clothes last week. He had expected to spend $100 on clothes. table How much was the ab

kolezko [41]

Answer:

$\$\ 25$

Step-by-step explanation:

By definition, the absolute error is defined as:

$\epsilon = |x_a - x_e|$

Where:

$\epsilon$ : is the error

$x_a$ : is the approximate value

$x_e$ : is the exact value

In this problem the approximate value was 100 and the exact value was 75. Then we substitute these values in the formula to find the error.

$\epsilon = |100 - 75|\\\epsilon = \$\ 25$

3 0

3 years ago

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