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3 years ago

Use a fives fact to help you solve 7x6.

Mathematics

1 answer:

DanielleElmas [232]3 years ago

3 0

Answer:

Step-by-step explanation:

Since 7x5=35, then 7x6=42. This is known as the fives fact rule, and I used it to figure it out.

Hope this helps! :)

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7(2x-5)=21 What is x?

Over [174]

Answer:

x = 4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

7(2x - 5) = 21

Step 2: Solve for x

Distribute 7: 2x - 5 = 3
Isolate x term: 2x = 8
Isolate x: x = 4

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Substitute in x: 7(2(4) - 5) = 21
Multiply: 7(8 - 5) = 21
Subtract: 7(3) = 21
Multiply: 21 = 21

Here we see that 21 does indeed equal 21.

∴ x = 4 is the solution to the equation.

6 0

3 years ago

How do I find A’? Let U={a,b,c,d,e,f,g} and A={a,b,e,f}

vesna_86 [32]

Let U={a,b,c,d,e,f,g,h}

A={a,c,d}

B={b,c,d}

C={b,e,f,g,h}

6 0

3 years ago

The circumference of a circular piece of plot is 440m. find the area pie is 22/7

morpeh [17]

Answer:

Step-by-step explanation:

Circumference = 2pi r

440 = 2 *22\7 *r

70 = r

Area= pi r^2

Area= 22\7 *70*70

Area =15400

7 0

3 years ago

What is the x-coordinate of the image of point (−2, 6) after a reflection in the -axis?

egoroff_w [7]

(2,6) after a reflection in the x axis

(-2,-6) after a reflection in the y axis

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3 years ago

Evaluate the expression. 12 +3•8

SpyIntel [72]

Answer:

15.8

Step-by-step explanation:

$12 \\ \: + 3.8 \\ = 15.8$

3 0

3 years ago

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