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3 years ago

Round 3153007 to nearest 100000

Mathematics

2 answers:

Vera_Pavlovna [14]3 years ago

6 0

it would be 3100000

Readme [11.4K]3 years ago

5 0

3150000 is the answer

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Martha spent 4/9 of her allowance on food and shopping. What fraction of her allowance had she left?

Mkey [24]

Her total allowance as a fraction could be expressed by 9/9. When you subtract the amount that she used, 4/9, you are left with 5/9, which is the solution.

7 0

3 years ago

Read 2 more answers

ANSWER ASAP PLZ!!

Vikentia [17]

$\text{If is}\\\\\left\{\begin{array}{ccc}0.2-0.3y=4\\2.3x-y=1.2\end{array}$

Answer:

$\large\boxed{\left(-\dfrac{344}{69},\ -\dfrac{38}{3}\right)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}0.2-0.3y=4\\2.3x-y=1.2&\text{multiply both sides by (-0.3)}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}0.2-0.3y=4\\-0.69x+0.3y=-0.36\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-0.69x+0.2=3.64\qquad\text{subtract 0.2 from both sides}\\.\qquad-0.69x=3.44\qquad\text{divide both sides by (-0.69)}\\.\qquad x=-\dfrac{3.44\cdot100}{0.69\cdot100}\\.\qquad \boxed{x=-\dfrac{344}{69}}\\\\\text{Calculate the value of y from first equation:}$

$0.2-0.3y=4\qquad\text{subtract 0.2 from both sides}\\-0.3y=3.8\qquad\text{divide both sides by (-0.3)}\\y=-\dfrac{3.8\cdot10}{0.3\cdot10}\\\boxed{y=-\dfrac{38}{3}}$

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$\text{If is}\\\\\left\{\begin{array}{ccc}0,2x-0,3y=4\\2.3x-y=1.2\end{array}\right$

Answer:

$\large\boxed{\left(-\dfrac{52}{7},\ -\dfrac{128}{7}\right)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}0.2x-0.3y=4&\text{multiply both sides by 10}\\2.3x-y=1.2&\text{multiply both sides by 10}\end{array}\right\\\\\left\{\begin{array}{ccc}2x-3y=40&\text{multiply both sides by (-10)}\\23x-10y=12&\text{multiply both sides by 3}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-20x+30y=-400\\69x-30y=36\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad49x=-364\qquad\text{divide both sides by 49}\\x=-\dfrac{364:7}{49:7}\\.\qquad\boxed{x=-\dfrac{52}{7}}$

$2\left(-\dfrac{52}{7}\right)-3y=40\\-\dfrac{104}{7}-3y=40\qquad\text{multiply both sides by 7}\\-104-21y=280\qquad\text{add 104 to both sides}\\-21y=384\qquad\text{divide both sides by (-21)}\\y=-\dfrac{384:3}{21:3}\\\boxed{y=-\dfrac{128}{7}}$

7 0

4 years ago

Help me please i will give brainliest :)

iris [78.8K]

Answer:

y = 3/2x + 1

Step-by-step explanation:

find the slope: goes up 9 over 6 => 9/6 = 3/2

the +1 is because the y intercept is not at (0, 0), it's at (0, 1)

I graphed it and got the same graph :)

6 0

3 years ago

Ifx=-3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the

Kazeer [188]

Answer:

D = 0

Step-by-step explanation:

Given

x-intercept = -3

Required

What does the discriminant represent?

The discriminant of a quadratic function can take any 3 values; these are as follows;

When D > 0
When D < 0
When D = 0

Which translates to

signifies that two different real roots exist
signifies that only complex roots exist
signifies that the two identical real roots exist

The question says that x-intercept = -3 is the only value;

This means that: x = -3 or x = -3

Analyzing the roots

3 and -3 are identical
-3 and -3 are real

This means they satisfy condition number 3;

Hence, D = 0

3 0

4 years ago

The volume of a cone is 540pi<br> Work out the height,of the cone.<br> The radius is 9cm

OLga [1]

Formula for volume of a cone = pi x r^2 x h/3

540pi = pi x 9^2 x h/3

Divide both sides by pi:

540= 9^2 x h/3

Simplify:

540 = 81 x h/3

Divide both sides by 81:

6 2/3 = h/3

Multiply both sides by 3

H = 20

the height is 20 cm

6 0

3 years ago