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slava [35]
3 years ago
7

How to write an equivalent expression for n times a using only addition

Mathematics
1 answer:
Zigmanuir [339]3 years ago
7 0
Maybe an answer would be 30=20+n  What is the value of the variable?
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$600 7) Nika puts 42 beads in each necklace. Which is the best way to use rounding numbers to estimate the number of beads Nika
kkurt [141]

Answer:

20 X 40 = 800 (split into 2 fourths) = 40

Step-by-step explanation

20 x 40 = 800;

For 2 necklaces she can split 800 into fourths.

800 - 40 = 80. (1 fourth)

80 - 40 = 40 (2 fourths)

40 - 40 = 0 (3 fourths)

She could split 800 into 2 fourths to get a number more than 0 and less then 42.

The best estimate of rounding 42 is 40. Because 40 is closer to 42.

4 0
3 years ago
Put these from greatest to least 20.7, 0.7, 2.7, 7.2, 0.07
Mrrafil [7]

Answer:

7.2  2.7  0.7  0.07

Step-by-step explanation:

3 0
3 years ago
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The diameter of a circle is 17 cm. Find the circumference \textit{to the nearest tenth}to the nearest tenth.
aev [14]

Answer:

52.4 cm

Step-by-step explanation:

Circumference of a circle = 2πr

Radius, r = diameter / 2

= 17 cm / 2

= 8.5 cm

π = 3.14

Circumference of a circle = 2πr

= 2 × 3.14 × 8.5

= 53.38 cm

Approximately 52.4 cm

5 0
3 years ago
A container has the shape of an open right circular cone, as shown. The height of the container is 10 cm and the diameter of the
SVETLANKA909090 [29]
A) Volume = (1/12)pi*h^3, with height = 5cm. 

<span>b) You should be able to differentiate V = (1/12)pi*h^3 with respect to h, and you were given dh/dt = -0.3 cm/hr. 
</span>
does that make sense?
5 0
3 years ago
A right triangle ABC is shown<br> 15<br> А<br> 8<br> В<br> What is cos A?
a_sh-v [17]
Just put it in a calculator using the cos button and you should get your answer
8 0
3 years ago
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