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murzikaleks [220]
3 years ago
7

Solve the equations by elimination method

Mathematics
1 answer:
notsponge [240]3 years ago
3 0

Answer: 1375

Step-by-step explanation:

70-2= 70

70/2=35 (x=35)

4x=140

x^35=1225

1225+140=1375

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Area of the rhombus shown below?
liraira [26]

Answer:

A

Step-by-step explanation:

The area (A) of a rhombus is calculated as

A = \frac{1}{2} product of diagonals

Here AC = 13 and BD = 15 are the diagonals, hence

A = 0.5 × 13 × 15 = 97.5 units² → A

5 0
3 years ago
In creating a new scale for the mercury thermometer, Anders Celsius initially set the boiling point of water at _____.
Damm [24]

Answer:

100°

Step-by-step explanation:

Anders Celsius used centigrade temperature scale along with mercury thermometers with a fixed boiling point of water at zero, he also used a fixed freezing point of water at the mark of 100-degree. This new scale was described in the year 1742 to Swedish Academy of Sciences.

3 0
3 years ago
Read 2 more answers
Find the three trigonometric..pls help due very soon
astraxan [27]

Answer:

sin 0 = 24/25

cos 0 = 7/25

tan 0 = 24/7

Step-by-step explanation:

hey there!

sine = opposite divided by hypotenuse

the opposite of angle 0 is 24 and the hypotenuse is 25 so sin 0 = 24/25

cosine = adjacent divided by hypotenuse

the adjacent of 0 is 7 and the hypotenuse is 25 so cos 0 = 7/25

Tangent.= opposite divided by adjacent

the opposite of 0 is 24 and the hypotenuse is 7 so tan 0 = 24/7

4 0
2 years ago
X^2 + 8 = 3<br>please help! show steps.​
Alborosie

x² + 8 = 3

x² = 3 - 8

x² = -5

x = √-5 or undefined

6 0
3 years ago
The sum of the dibits of a two digit number is 15. The number obtained by interchanging its digits exceeds the given number by 9
QveST [7]

Answer:

  78

Step-by-step explanation:

Interchanging the digits of a 2-digit number changes the value by a multiple of 9. The multiple is the difference between the digits of the number.

So, we have two digits that add to 15, and have a difference of 9/9 = 1. Since you're familiar with your addition facts, you know that the two digits are 7 and 8. Since the number we're looking for is the smallest of the numbers you can make with those digits, ...

  the original number is 78.

_____

More formally, let t and o represent the tens and ones digits of the original number.

  t + o = 15 . . . . . . the sum of digits is 15

  (10o +t) - (10t +o) = 9 . . . . swapping digits increases the value by 9

The latter equation simplifies to ...

  9o -9t = 9 . . . . collect terms

  o - t = 1 . . . . . . divide by 9 . . . (note the difference of digits is 9/9=1)

Adding this to the first equation gives ...

  (t +o) +(o -t) = (15) +(1)

  2o = 16

  o = 8

  t = o -1 = 7

The tens digit is 7 and the ones digit is 8: 78.

3 0
3 years ago
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