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3 years ago

-4 (-3 + 5 + (-2)) show all steps

Mathematics

2 answers:

CaHeK987 [17]3 years ago

6 0

Answer:

= 0

Step-by-step explanation:

-4(-3 + 5 +(-2 ))

get rid of the "( )"

-4 (- 3 + 5 - 2)

calculate the sum

-4 x 0

anything times 0 = 0 so the answer is;

Marina CMI [18]3 years ago

3 0

Answer:

Step-by-step explanation:

-4(-3 + 5 + (-2))

-4(-3 + 5 -2)

-4 • 0

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Susie is having a party with 15 guests. she wants to feed everyong sandwhiches.if susie buys 7 1/2 pounds of meat, how much meat

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Take 7.5 and divide by 15.
7.5/15=.5
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3 years ago

What is the axis of symmetry gor Graph A

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Answer:

X=-2

Step-by-step explanation:

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3 years ago

Simplify 4 n5 + 3.5 n5 + (-2.1 n5 ).

Alona [7]

Step-by-step explanation:

Step 1: Let's simplify step-by-step.

$4n^5 + 3.5n^5 - 2.1n^5$

$= 4n^5 + 3.5n^5 + -2.1n^5$

Step 2: Combine Like Terms:

$= 4n^5 + 3.5n^5 + -2.1n^5$

$= (4n^5 + 3.5n^5 + -2.1n^5)$

$= 5.4n^5$

Answer:

$=5.4n^5$

Hope this helps.

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2 years ago

A gas station sells two grades of gasoline: regular and super. These are priced at $2.00 and $3.00 per gallon, respectively. Let

djyliett [7]

Answer:

(a) E(Y) = 4400

sd (Y) =225

(b) P(Y ≤ 4500) = 0.67003

Step-by-step explanation:

(a) Here we have

Y = 2·X₁ + 3·X₂

Therefore E(Y) = 2·E(X₁) + 3·E(X₂) = 2000 + 2400 = 4400

sd(Y) is given by

Variance Y = (sd (Y))² = 2²·(sd (X₁))² + 3²·(sd (X₂))²

= 4·8100 + 9·2025 = 50625

sd (Y) = √50625 = 225

(b) The probability that the revenue does not exceed 4500 is given by

P(Y ≤ 4500) = P(z ≤0.444)

z = $\frac{\overline{\rm x} - \mu} {\sigma /\sqrt{n} }$

z = $\frac{4500 - 4400} {225 /\sqrt{1} }$ = 0.444

Therefore from the normal distribution table, we have

P = 0.67003

Since the gas station sells 2 portions of X₁ to 3 portions of X₂

Therefore, the probability that the gas station sells more of X₁ is given by

₅C₀ × 2/5⁰×3/5⁵ = 0.07776

₅C₁ × 2/5¹×3/5⁴= 0.2592

₅C₂ × 2/5²×3/5³ = 0.3456

P (X₁ > X₂) = 1 - 0.68256 = 0.31744

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