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2 years ago

What is the answer to this?

Mathematics

2 answers:

rusak2 [61]2 years ago

7 0

Answer:

x= -1, y = -1

Step-by-step explanation:

-16x +24y = -8

16x -8y = -8

16y = -16

y=-1

16x = -16

x = -1

Dmitriy789 [7]2 years ago

7 0

Answer:

x = - 0.25 = - 1 / 4

y = 0.5 = 1 / 2

Step-by-step explanation:

4x + 6y = 2

Divide 2 on both sides,

2x + 3y = 1 ----> eq. 1

16x - 8y = - 8

Divide - 8 on both sides,

- 2x + y = 1 ----> eq. 2

Add eq. 1 and 2,

2x + 3y = 1

- 2x + y = 1

_________

0 + 4y = 2

4y = 2

y = 2 / 4

y = 1 / 2

y = 0.5

Substitute y = 0.5 in eq. 2,

- 2x + y = 1

- 2x + 0.5 = 1

- 2x = 1 - 0.5

- 2x = 0.5

x = 0.5 / - 2

x = - 0.25

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Mortar is made by mixing cement, sand and quicklime in the ration 1:2:3

timurjin [86]

Answer with step-by-step explanation:

If the ratio for the ingredients is 1:2:3, then the total would be 6. If so, we have to divide 2.1 by 6, which is 0.35. Now, you need to multiply 0.35 to the according ingredient amounts.

Cement: 1 x 0.35 = 0.35

Sand: 2 x 0.35 = 0.70

Quicklime: 3 x 0.35 = 1.05

If you add it up, you will get 2.1, which is the volume.

Hope this helped! (brainliest please)

3 0

3 years ago

2k-6-7+3k = 48 need the answer!

Radda [10]

$\huge{\fbox{\sf{ k= 12.2}}}$

<u>Step by step explanation:</u>

Step 1:

$2k-6-7+3k = 48$

Step 2:

$5k - 13 = 48$

Step 3:

$5k = 48 + 13$

Step 4:

$5k = 61$

Step 6:

$k = 12.2✓$

3 0

3 years ago

Read 2 more answers

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kherson [118]

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