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3 years ago

Which of the following represents the most accurate estimation of 38 + 23?

Mathematics

1 answer:

Arte-miy333 [17]3 years ago

3 0

The Correct Answer is

Ex. 38+ 23=30 + 20 +8 +3=50+8+3=58+3=61.

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HELP ASAP

Alexxandr [17]

Answer: A − 9/7

Step-by-step explanation:

Hi, to answer this question we have to convert all the numbers into decimal form.

-3 1/3 = - (3x3+1)/3 =-10/3 = - 3.3334

-4/5 = -0.8

Since he number must greater than −3 1/3 but less than − 4/5.

−3 1/3 < x < − 4/5.

- 3.3334 < x < -0.8

The correct option is A = -9/7 , because in decimal form is equal to -1.28-

- 3.3334 < -1.28 < -0.8

5 0

2 years ago

In △RST, RW=27 cm . What is the length of RX¯¯¯¯¯¯?

Yanka [14]

The answer to your question is 22.

4 0

2 years ago

Read 2 more answers

Let u = (1, 2 -2), v= (2, 1, 3) and w = j + 4k. a) Find cos theta, where theta is the angle in degrees between u and w.

vodka [1.7K]

Answer: The value of cos theta is -0.352.

Step-by-step explanation:

Since we have given that

$\vec{u}=1\hat{i}+2\hat{j}-2\hat{k}\and\\\\\vec{w}=\hat{j}+4\hat{k}$

We need to find the cos theta between u and w.

As we know the formula for angle between two vectors.

$\cos\ \theta=\dfrac{\vec{u}.\vec{w}}{\mid u\mid \mid w\mid}$

So, it becomes,

$\cos \theta=\dfrac{2-8}{\sqrt{1^2+2^2+(-2)^2}\sqrt{1^2+4^2}}\\\\\cos \theta=\dfrac{-6}{\sqrt{17}\sqrt{17}}=\dfrac{-6}{17}=-0.352\\\\\theta=\cos^{-1}(\dfrac{-6}{17})=110.66^\circ$

Hence, the value of cos theta is -0.352.

8 0

3 years ago

How do you compare two ratios

serious [3.7K]

Answer:

how you can divide them I believe

Step-by-step explanation:

you need to divided both of them to see a difference

7 0

2 years ago

Find the area of an equilateral triangle whose value is 18 cm

rusak2 [61]

Answer:

$18 + 18 + 18 = 18 \times 3 = 54$

Step-by-step explanation:

I ain't sure but it might help you out:D

3 0

2 years ago

Read 2 more answers