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3 years ago

Solve for x: 4.8x = 16.8 please give step by step explanation

Mathematics

2 answers:

pishuonlain [190]3 years ago

4 0

Answer: x=3.5

Step-by-step explanation:

Divide each term by 4.8 and simplify :) hope this helps, and if it does, can you mark brainiest? my answers have been getting deleted if they are not marked. :(

Luba_88 [7]3 years ago

4 0

Answer:

x=3.5

Step-by-step explanation:

Simplify ——

Equation at the end of step

48 84

(—— • x) - —— = 0

10 5

STEP

Simplify ——

Equation at the end of step 2:

24 84

(—— • x) - —— = 0

5 5

STEP 3:

Adding fractions which have a common denominator :

3.1 Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

24x - (84) 24x - 84

—————————— = ————————

5 5

STEP 4:

Pulling out like terms :

4.1 Pull out like factors :

24x - 84 = 12 • (2x - 7)

Equation at the end of step 4:

12 • (2x - 7)

————————————— = 0

The equation now takes the shape :

12 • (2x-7) = 0

Equations which are never true:

5.2 Solve : 12 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

5.3 Solve : 2x-7 = 0

Add 7 to both sides of the equation :

2x = 7

Divide both sides of the equation by 2:

x = 7/2 = 3.500

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The perimeter of an equilateral triangle is 65 cm, to the nearest centimetre.

iogann1982 [59]

Answer:

The smallest possible side length is around 21.3.

Step-by-step explanation:

Equilateral triangles have 3 sides of equal lengths.

65 ÷ 3 = $\frac{65}{3}$ or 21.333

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3 years ago

Read 2 more answers

Andy got a 32% discount on all his purchases at his favorite shop. If he saved $64 on the total bill, the bill amount without th

lesya692 [45]

purchases * percentage discount = savings

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divide each side by .32

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3 years ago

Which expression is equal to 5/(sqrt)11?

horrorfan [7]

Answer:

Option A is correct

the expression is equal to $\frac{5}{ \sqrt{11}}$ is $\frac{5\sqrt{11}} {11}$

Explanation:

Given expression is, $\frac{5}{ \sqrt{11}}$

Multiply and divide by the denominator by $\sqrt{11}$ in the given expression, we have,

$\frac{5}{\sqrt{11}} \times \frac{\sqrt{11}} { \sqrt{11}}$

$\frac{5 \cdot \sqrt{11}} {\sqrt{11} \cdot \sqrt{11}}$

use : $\sqrt{a}\cdot\sqrt{a}=(\sqrt{a} )^2 = a$

then;

$\frac{5\sqrt{11}} { (\sqrt{11})^2} =\frac{5\sqrt{11}} {11}$

Therefore, the expression is equal to $\frac{5}{ \sqrt{11}}$ is, $\frac{5\sqrt{11}} {11}$

8 0

3 years ago

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How many solutions does this linear system have <br><br> y = 2x - 5<br><br> -8x - 4y = -20

Ray Of Light [21]

replace the 1st equation into the 2nd one for y

-8x-4(2x-5) = -20

-8x-8x+20 =-20

-16x+20 = -40

-16x=-40

x = 5/2 = 2.5

y = 2x-5 - 2(2.5) - 5 = 5-5 = 0

one solution (2.5,0)

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3 years ago

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Let G denote the centroid of triangle ABC. If triangle ABG is equilateral with side length 2, then determine the perimeter of tr

zhannawk [14.2K]

We know from Euclidean Geometry and the properties of a centroid that GC=2GM. Now GM=sin60*GA= $\sqrt{3}$ . Hence CM=GC+GM=3* $\sqrt{3} /$ . Now, since GM is normal to AB, we have by the pythagoeran theorem that:
$AC^2=AM^2+GM^2=BM^2+GM^2=BC^2$
Hence, we calculate from this that AC^2= 28, hence AC=2* $\sqrt{7}$ =BC. Thus, the perimeter of the triangle is 2+4* $\sqrt{7}$ .

3 0

4 years ago