3 years ago

Mentalmath grade 3 $1.00-$0.37

Mathematics

1 answer:

Mkey [24]3 years ago

6 0

Answer:

$0.63

Step-by-step explanation:

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A bag contains 42 red, 45

AlexFokin [52]

Answer:

Step-by-step explanation:

First of,

or, in probability is subtraction and not means you shouldn't use green (therefore leaving you with yellow and red)

Red = 42

Yellow = 20

P(Yellow or Not Green) = $\frac{R+Y}{2}$

⁘ $\frac{42+20}{2}$ = $\frac{62}{2}$

Hence, 31

7 0

2 years ago

Determine whether The following number sentences are true or false. Justify your answer 6+5=18+5

NemiM [27]

Answer:

5x+1(6-4) = +1(5x6)-(5x)

Step-by-step explanation:

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4 years ago

Solve for a. 7a - 2b = 5a + b a = 2b a = 3b a = b a = b

larisa [96]

$\\
\text{Consider the equation}\\
\\
7a-2b=5a+b\\
\\
\text{to solve for a, we will first add 2b both sides. so we get}\\
\\
7a-2b+2b=5a+b+2b\\
\\
\Rightarrow 7a=5a+3b\\
\\
\text{now subtract 5a both sides. so we have}\\
\\
7a-5a=3b\\
\\
\Rightarrow 2a=3b\\
\\
\text{divide 2 both sides to get}\\
\\
\Rightarrow a=\frac{3b}{2}$

Hence the value of a is: 3b/2

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3 years ago

What is the perimeter of this trapezoid?

Aleks04 [339]

Answer:

20 units

Step-by-step explanation:

see image

4 0

2 years ago

The area, A, of the rectangle below is 3/4 square ft. If A = length x width, what is the length of the rectangle?

Setler [38]

Answer:

$\frac{3}{4w} =l$

Step-by-step explanation:

The area of a rectangle is found using the formula A = l*w. We know the area is A = 3/4 square foot. To find the length in terms of w, solve for l by multiplying by the reciprocal of w.

$A = l*w\\\frac{3}{4} =l*w\\\frac{3}{4} *\frac{1}{w} = l\\\frac{3}{4w} =l$

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3 years ago