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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>

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Don breaks a 4×7 array into a 2×7 and another array. What is the fact for Don's second array?

LenKa [72]

The fact for Dons second array is that all he did was divide the second array in half.(4×7=28). (2×7=14). ( 28÷2=14). Hopefully that made sense!!!!!

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3 years ago

10 times as many as 2 hundred is 20 hundreds or 2 thousand

emmasim [6.3K]

Answer:

2 thousand 10s

Step-by-step explanation:

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3 years ago

A positive real number is 2 less than another. When 4 times the larger is added to the square of the smaller, the result is 49.

Kobotan [32]

Answer:

The numbers are

$-2+3\sqrt{5}$ and $3\sqrt{5}$

Step-by-step explanation:

Let

x -----> the smaller positive real number

y -----> the larger positive real number

we know that

A positive real number is 2 less than another

$x=y-2$

$y=x+2$ ----> equation A

When 4 times the larger is added to the square of the smaller, the result is 49

$4y+x^2=49$ ----> equation B

substitute equation A in equation B

$4(x+2)+x^2=49$

solve for x

$x^2+4x-41=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+4x-41=0$

$a=1\\b=4\\c=-41$

substitute in the formula

$x=\frac{-4\pm\sqrt{4^{2}-4(1)(-41)}} {2(1)}$

$x=\frac{-4\pm\sqrt{180}} {2}$

$x=\frac{-4\pm6\sqrt{5}} {2}$

$x=-2\pm3\sqrt{5}$

The positive real number is

$x=-2+3\sqrt{5}$

Find the value of y

$y=x+2$

$y=-2+3\sqrt{5}+2$

$y=3\sqrt{5}$

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4 years ago

If you ate half of the servings in this container, how many calories would you have consumed?

Elan Coil [88]

Answer:

230(1/2)= 115

920(1/2)= 460

460(1/2)= 230

1840(1/2)= 920

5 0

3 years ago

Read 2 more answers

F(x) = 2x3 + 7x2 – 4x – 5

qaws [65]

Answer:

Its 3

Step-by-step explanation:

7 0

3 years ago