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3 years ago

I need help with this please help

Mathematics

2 answers:

Amiraneli [1.4K]3 years ago

8 0

Answer:

i think its infinitely many solutions

explanation; b + 14 = X and X can be anything, therefore theres many solutions

AlekseyPX3 years ago

7 0

Answer:

There are infinitely many solutions

Step-by-step explanation:

Whatever number you plug in you'll get the same answer on both sides

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a bricklayer needs to order 6300kg of building sand.one grain of this sand weighs 7x10^-5. how many grains of sand are there in

gavmur [86]

Answer:

44.1 x 10^-2

Step-by-step explanation:

Since one grain

= 7 x 10^-5

6300kg = 7 x 10^-5 x 6300

Put 6300 in standard form

7 x 10^-5 x 6.3 x 10^3

Multiply the whole numbers and add the exponents

7 x 6.3 x 10^-5 + 3

44.1 x 10^-2

There are 44.1 x 10^-2 grains of sand in 6300kg

5 0

3 years ago

Pls can someone help me. I m giving 10 pts . I may mark you as the braniliest

worty [1.4K]

100 notes were altogether

Solution:

Given that ratio of the number of $2 notes to the number of $5 notes was 4 : 1

number of $2 notes : number of $5 notes = 4 : 1

Let 4x be the number of $ 2 notes

Let 1x be the number of $ 5 notes

Given that total value of notes is $ 260

Therefore,

$ 2 (number of $ 2 notes ) + $ 5(number of $ 5 notes ) = $ 260

$ 2(4x) + $ 5(1x) = $ 260

8x + 5x = 260

13x = 260

x = 20

Thus number of notes altogether is given as:

4x + 1x = 4(20) + 1(20) = 80 + 20 = 100

Thus 100 notes were altogether

4 0

3 years ago

2. What is the value of x if the angles within a triangle are 2x +1, 7x-2 and 3x +5?

noname [10]

Answer:

$x=14.67\\$ °

Step-by-step explanation:

The sum of all the three angles of any triangle is 180°

Putting sum of all the angles given equals to 180°

$(2x+1)+(7x-2)+(3x+5)=$ $180$ °

$2x+7x+3x+1-2+5=180$ °

$12x+4=180$ °

$x=\frac{180-4}{12}$

$x=14.67\\$ °

The value of the x is found on solving the given angles of the triangles.

8 0

3 years ago

Which of these options is not a quadratic equation in x?

il63 [147K]

Answer:

3x³ - 2x² + 1 = 0

Step-by-step explanation:

By definition, a quadratic equation cannot have an exponent higher than 2.

6 0

3 years ago

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What did I do wrong in this?? I have no idea its due soon. Sorry about my handwriting

olya-2409 [2.1K]

Answer:

$x = 16$

Step-by-step explanation:

$\frac{1}{2} (x + 8) - 16 = - 4$

$\frac{1}{2} x + 4 - 16 = - 4$

$\frac{1}{2} x + 4 = 12$

$\frac{1}{2} x = 8$

$x = 16$

5 0

3 years ago

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