All categories

3 years ago

Which symbol replaces ? to make the statement true?

Mathematics

1 answer:

Leni [432]3 years ago

3 0

Use PEMDAS

P Parentheses first

E Exponents (ie Powers and Square Roots, etc.)

MD Multiplication and Division (left-to-right)

AS Addition and Subtraction (left-to-right)

3 ⋅ 12 − 12 = 36 - 12 = 24

3 ⋅ [26 − 2 ⋅ (3 + 6)] = 3 · (26 - 2 · 9) = 3 · (26 - 18) = 3 · 8 = 24

<h3>Answer: =</h3>

You might be interested in

Sketch the plane representing -2x²=-8

stellarik [79]

I found this answer from Brainly.

Somebody else did this question.

**But it's not my answer**

I hope it's helpful and correct!!

7 0

2 years ago

(6+9)2+6(600-9)+600 divide 30

Evgesh-ka [11]

Step-by-step explanation:

GIVEN

HERE

= 6+9+2+6+600÷30 { firstly add numbers }

= 623 ÷ 30

= 20

I think you understand

8 0

2 years ago

Read 2 more answers

Find a linear second-order differential equation f(x, y, y', y'') = 0 for which y = c1x + c2x3 is a two-parameter family of solu

Alisiya [41]

Let $y=C_1x+C_2x^3=C_1y_1+C_2y_2$ . Then $y_1$ and $y_2$ are two fundamental, linearly independent solution that satisfy

$f(x,y_1,{y_1}',{y_1}'')=0$
$f(x,y_2,{y_2}',{y_2}'')=0$

Note that ${y_1}'=1$ , so that $x{y_1}'-y_1=0$ . Adding $y''$ doesn't change this, since ${y_1}''=0$ .

So if we suppose

$f(x,y,y',y'')=y''+xy'-y=0$

then substituting $y=y_2$ would give

$6x+x(3x^2)-x^3=6x+2x^3\neq0$

To make sure everything cancels out, multiply the second degree term by $-\dfrac{x^2}3$ , so that

$f(x,y,y',y'')=-\dfrac{x^2}3y''+xy'-y$

Then if $y=y_1+y_2$ , we get

$-\dfrac{x^2}3(0+6x)+x(1+3x^2)-(x+x^3)=-2x^3+x+3x^3-x-x^3=0$

as desired. So one possible ODE would be

$-\dfrac{x^2}3y''+xy'-y=0\iff x^2y''-3xy'+3y=0$

(See "Euler-Cauchy equation" for more info)

6 0

3 years ago

Zoe is working two summer jobs, making $7 per hour babysitting and making $15 per

Rasek [7]

Answer:

7, 8, 9, 10

Step-by-step explanation:

If Zoe worked 4 hours of babysitting at $7 per hour, she earned $28. Therefore, she must earn another $102 to earn at least $130. At $15 per hour, she must work a minimum of 7 hours clearing tables to make at least $102. This is fine since she can work another 10 hours before reaching her maximum of 14 total hours. Therefore, all possible values for the number of whole hours clearing tables that she must work to meet her requirements are 7, 8, 9, 10.

6 0

3 years ago

Read 2 more answers

You can use the formula a = h/n is you want to find the batting average a of a batter who has h hits in n times at bat. Solve th

Akimi4 [234]

The formula is:
a = h / n.
h = a · n
If a = 0.285 and n = 400, then:
h = 0.285 · 400 = 114
Answer:
Joseph has 114 hits.

6 0

3 years ago

Read 2 more answers