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3 years ago

Solve by factorisation 2x2 + 3x - 20 = 0

Mathematics

1 answer:

ivolga24 [154]3 years ago

3 0

Step-by-step explanation:

4 + 3x -20 = 0

3x - 16 = 0

3x = 16

x = 16/3

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Find the sum. 64 + (-15)

V125BC [204]

Answer:

Step-by-step explanation:

64- 15 = 49

Hope that this helps you and have a great day

8 0

3 years ago

3/10 + 62/100 =<br> WILL YOU PLEASE GIVE STEPS TO FIND THE SUM ON THE PROBLEM ABOVE?

fomenos

3/10 = 30/100 after multiplying top and bottom by 10

so we have 30/100 + 62/100 = (30+62)/100 = 92/100

Reduce this fraction

92/100 = (23*4)/(25*4) = 23/25

Therefore, 3/10+62/100 = 23/25

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4 years ago

Hi guys how do u order decimals like this

Stels [109]

Answer:

Ascending Order: 0.432 < 0.5734 < 0.76373

Descending Order: 0.76373 < 0.5734 < 0.432

Step-by-step explanation:

Check the tenths place of the decimal number and order them accordingly. If the tenths place is the same for two decimal numbers, go on to the next corresponding place to compare their values.

6 0

2 years ago

Michelle found the area of a circle as 78.5 〖in〗^2. She used 3.14 for π. What is the radius of the circle? Explain how you found

SCORPION-xisa [38]

Answer:

r = 5 inches

Step-by-step explanation:

Area of circle, $A=78.5\ in^2$

It is required to find the radius of the circle. The area of a circle is given by the formula :

$A=\pi r^2$

r is radius of the circle

$r=\sqrt{\dfrac{A}{\pi}} \\\\r=\sqrt{\dfrac{78.5}{3.14}} \\\\r=5\ \text{inch}$

So, the radius of the circle is 5 inches.

5 0

3 years ago

A drawbridge rises at a rate of 3 2/3 feet per minute. The drawbridge rises to a height of 50 feet. How long does it take the dr

k0ka [10]

Answer: Third option.

Step-by-step explanation:

You know that the drawbridge rises at a rate of $3\ \frac{2}{3}$ feet per minute. This means that the drawbridge rises $3\ \frac{2}{3}$ in a minutes.

Convert from mixed fraction to decimal number:

$3\ \frac{2}{3}\ ft=(3+0.66)\ ft=3.6\ ft$

Since the drawbridge rises to a height of 50 feet, you need to apply this procedure in order to find the time the drawbridge takes to completely rise:

$time=\frac{(1\ min)(50\ ft)}{3.66\ ft}=13.6\ min$ or $13\ \frac{7}{11}\ min$

7 0

3 years ago

Read 2 more answers