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3 years ago

Solve the following expression: (-23 +11) – (-3 – 7)

Mathematics

2 answers:

Romashka [77]3 years ago

6 0

Answer: -16

Step-by-step explanation:

First do 23-11 because a positive and a negative means to subtract which then in that part you get 12. Then you have the negative sign in the middle of both of the parenthesis so you have a negative in sign which u have to then add the + in the expression. You'l then add the expression which is= -12+3-7, then subtract the 12-3= -9. Then the short expression is -9-7= -16. (keep the bigger numbers sign). The end.

saw5 [17]3 years ago

5 0

-2 (order of operations)

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When Arjun makes hot cocoa, he adds 20ml of chocolate syrup for every 3 ounces of hot water. Arjun's brother, Eli, adds 45mL of

Digiron [165]

Answer:

Eli

Step-by-step explanation:

Arjun: 20÷3=6.6666666667

6.6666666667mL of chocolate syrup for every ounce of hot water.

Eli: 45÷6=7.5

7.5mL of chocolate syrup for every ounce of hot water

Conclusion: Eli has the hot cocoa with the most chocolate

6 0

3 years ago

X to the power of 3 - 7x + 6 factorise please whole step by step

Over [174]

Answer:

$(x + 3)(x - 2)(x - 1)$

Step-by-step explanation:

${x}^{3} - 7x + 6$

Factor using Rational Root Theorem.

This means our possible roots are

positve or negative (1,2,3,6). If we try positve 1, it is indeed a root.

This means that

$(x - 1)$

is a root.

We can divide the top equation by the root (x-1). Our new equation is

$( {x}^{2} + x - 6)$

Now we can factor this completely

$(x + 3)(x - 2)$

So this equation in factored form is

$(x + 3)(x - 2)(x - 1)$

8 0

3 years ago

Please answer right away

Andreas93 [3]

Answer:

20 miles with an error margin of ± 8 miles

Step-by-step explanation:

The margin of error of a result is the range in which an error can vary. To find the margin of error between both distances we have to

28-12 = 16, that is, the variation of the result has a range of 16 miles. So we will look for the midpoint of both distances

(X2-X1)/2+X1=(28-12)/2+12=16/2+12=8+12=20

So from this midpoint the value can vary between 8 points below and 8 points above that would cover the difference of 16 miles that we observed at the beginning

In this way, the correct answer is 20 miles with an error margin of ± 8 miles

Done

8 0

3 years ago

Need help asap

Marizza181 [45]

Its b for sure i worked it out

3 0

4 years ago

If there are 206 people and 80 say no and 126 say yes how many percent say yes or no?

monitta

25.75% say no- 206/80 then * 10 (x)
74.25% say yes- 100-x