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Vika [28.1K]
3 years ago
7

-1/13-10/39 please solve for me I dont seem to get it

Mathematics
1 answer:
vampirchik [111]3 years ago
4 0

Answer:

\frac{-1}{3}

Step-by-step explanation:

\frac{-1}{13} - \frac{10}{39}

Find common denominator for 13 and 39

common denominator is 39

rewrite fractions so they have the same denominator

\frac{-1}{13} = \frac{-3}{39}

add them up

\frac{-3}{39} + \frac{-10}{39}  = \frac{-13}{39}

simplify/ put in the lowest terms

\frac{-1}{3}

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AB<br> Round your answer to the nearest hundredth.<br> С<br> 4<br> A<br> 25°<br> ?<br> B
Nana76 [90]

Answer:

AB ≈ 4.41

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos25° = \frac{adjacent}{hypotenuse} = \frac{AC}{AB} = \frac{4}{AB} ( multiply both sides by AB )

AB × cos25° = 4 ( divide both sides by cos25° )

AB = \frac{4}{cos25} ≈ 4.41 ( to the nearest hundredth )

6 0
3 years ago
Help again pleasepleaseplease
Ilia_Sergeevich [38]

Answer:

9.5

Step-by-step explanation:

The legs of the triangle are

3 and 9

From the Pythagorean Theorem

c² = a²+ b²

c² = 3² + 9²

c² =  = 9 + 81

c² =  90

Take the square root of both sides

c = 9.4868329805

Rounded

9.5

7 0
3 years ago
The label on a can of lemonade gives the volume as 12 fl oz or 355ml . Verify that these two measurements are nearly equivalent
liraira [26]

We have been given that the label on a can of lemonade gives the volume as 12 fl oz or 355 ml and we are asked to verify that these two measurements are nearly equivalent.

Since we know that 1 fluid ounce equals 29.5735 ml. Let us find volume of lemonade can in ml by multiplying 12 by 29.5735.

\text{Volume of can}=12\cdot29.5735

\text{Volume of can}=354.882

\text{Volume of can}=354.882\approx355

We can see that 354.882 is nearly equivalent to 355. Therefore, we can say that these two measurements are nearly equivalent.


6 0
4 years ago
At a store, markers are sold in packages of 12 and pens are sold in packages of 8. What is the least amount of markers and pens
liubo4ka [24]

Given:

Markers are sold in packages of 12 and pens are sold in packages of 8.

To find:

Least amount of markers and pens Rick needs to buy to have an equal number of markers and pens

Solution:

To find the least amount of markers and pens, we need to find the LCM of 12 and 8.

Prime factors of 8 and 12 are

8=2\times 2\times 2

12=2\times 2\times 3

To find the LCM, multiply all factors but the common factors are included only once.

LCM(8,12)=2\times 2\times 2\times 3

LCM(8,12)=24

Therefore, the least amount of markers and pens Rick needs to buy to have an equal number of markers and pens is 24.

5 0
4 years ago
Solve x^2−4x−12=0 by completing the square. PLEASE HELP QUICK WILL GIVE BRAINLIEST
Sliva [168]

Answer:

The answer is B

Step-by-step explanation:

If u use calculator,u will get the ans as x¹=6 and x²= -2 but u have to change it to the opposite which means negatif to positive(-2=2) and positive to negative(6= -6).Hope u can understand...sorry,English isn't my first language

4 0
3 years ago
Read 2 more answers
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