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aleksklad [387]
3 years ago
10

True or False No links

Mathematics
2 answers:
AlladinOne [14]3 years ago
7 0

Answer:

False

<em>Brainliest, please!</em>

Step-by-step explanation:

+ + = +

- - = +

+ - = -

- + = -

astraxan [27]3 years ago
3 0

Answer:

False

Step-by-step explanation:

The question doesn't specify whether you are adding positive or negative integers. If you have add 2 positive integers, your answer will be positive. If you add 2 negative integers, the answer will be negative. Here is an example;

1 + 1 = 2

-1 + (-1) = -1 - 1 = -2

Best of Luck!

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Please helpppppppppppp
morpeh [17]

Answer:

7.7 km

Explanation:

Use cosine rule as here given two sides and one angle.

Cosine rule states:

a² = b² + c² - 2bc cos(A)

While solving, treat a = 7.5 km as to that opposite angle is given of 68°

then b = missing side, c = 5.2 km, A = 68°

Applying rule:

7.5² = b² + 5.2² - 2(b)(5.2) cos(68)

56.25 = b² + 27.04 - 3.8959b

56.25 - 27.04 = b² - 3.8959b

b² - 3.8959b = 29.21

b² - 3.8959b - 29.21 = 0

apply quadratic equation, Here [a = 1, b = - 3.8959, c = -29.21]

\sf b = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \quad\:when \:\ ax^2 + bx + c = 0

\sf b = \dfrac{ -(-3.8959) \pm \sqrt{(-3.8959)^2 - 4(1)(-29.21)}}{2(1)}

\sf b = 7.69 291 \quad or \quad b = -3.797

\sf b = 7.7 \quad (rounded \ to \ nearest \ tenth)

As length cannot be negative. Hence the value of b is only 7.7 km

7 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!
KonstantinChe [14]

Step-by-step explanation:

RS = 8 × cos(61°) = 2.9 [1 dp] = 3cm

6 0
3 years ago
18-h=13;h=-5<br> True or False?
madam [21]

18 - h = 13 when h = -5

18 - (-5) = 13

18 + 5 = 13

23 = 13

False, h would need to equal +5

Hope this helps! ;)

4 0
3 years ago
Read 2 more answers
Whats 4x/2x if x=infinity?
OLga [1]
0 with a / through it representing infinite outcomes
4 0
3 years ago
Can someone help me please???​
malfutka [58]
Which question? All of them???
3 0
2 years ago
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