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Reil [10]
3 years ago
13

What addition doubles fact can help you find 4 + 3 explain how you know

Mathematics
2 answers:
Triss [41]3 years ago
7 0
4 + 3 = 7
Hope this helps!
Xelga [282]3 years ago
6 0
An addition doubles fact that can help me find 4 + 3 is 3 + 4. I know because 4 + 3 is the same as 3 + 4 and if I know 3+4  I know 4 + 3 because of the communitive property. 
(Thats what my teacher told me what was correct) 
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What is the best estimate for 591.3 divided by 29
Katena32 [7]

Answer:

  about 20

Step-by-step explanation:

The numbers round to 600/30 = 20, which is a reasonable estimate.

You can refine this by doing the next step of long division:

  29×20 = 580

Subtracting this from 591.3 give 11.3, so the fraction is ...

  11.3/29 ≈ 10/30 = 1/3

A better estimate is 20 1/3.

_____

A calculator tells you the quotient is about 20.3897.

4 0
3 years ago
Bella has sampled the heights of 30 students at Ridgemont High and obtained a mean of 64.2 inches. He constructs a 90% confidenc
barxatty [35]
The correct answer for the question that is being presented above is this one: "<span>C) </span>4.2 inches." Bella has sampled the heights of 30 students at Ridgemont High and obtained a mean of 64.2 inches. He constructs a 90% confidence interval, which turns out to be (61.0, 67.4). The margin of error is <span>C) </span><span>4.2 inches </span>
7 0
4 years ago
Two sixth-grade science classes are making salt water solutions. The first class (Class A) is using a ratio of three parts salt
kykrilka [37]

Answer:

fifufufififufufoturaitsktt

7 0
3 years ago
The length of a rectangle is twice its breadth. If its length is decreased half of the 10 cm and the breadth is increased by hal
Leto [7]

Since the length of this rectangle is twice its breadth, the length is equal to 40 cm.

<h3>How to calculate the area of a rectangle?</h3>

Mathematically, the area of a rectangle can be calculated by using this formula:

Area = Length × Width

Based on the information provided, we have:

  • Its length is decreased half of the 10 cm ⇒ (length - 5)
  • Its breadth is increased by half of the 10 cm ⇒ (breadth + 5)
  • Its area is increased by 75 cm ⇒ (area + 5)

Substituting the parameters into the formula, we have:

LB + 75 = (L - 5)(B + 5)

2B² + 75 = (2B - 5)(2B + 5)

2B² + 75 = 2B(B + 5) - 5(B + 5)

2B² + 75 = 2B² + 10B - 5B - 25

5B = 75 + 25

5B = 100

B = 100/20

B = 20 cm.

For the length, we have:

L = 2B

L = 2 × 20

L = 40 cm.

Read more on rectangle here: brainly.com/question/25292087

#SPJ1

6 0
2 years ago
What is the diffrence between 4x (4 to the power of x) and x4( x to the power of 4)? evalutate both of these expressions when x=
marusya05 [52]
The difference is that in 4x you are multiplying 4 two times and in x4 you are multiplying 2 four times so 4x will be 4*4and x4 will be 2*2*2*2
4 0
3 years ago
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