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3 years ago

10

Question 16 please...

1 answer:

Juliette [100K]3 years ago

5 0

Brita have 323 in her account before the withdrawal

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Simplify the expression: 6 + 3(x + 4) <br>А 6 + 3x + 12 <br>B 9x + 36 <br>C 3x + 18 <br>D 9x + 4

Goryan [66]

Answer:

(C) 3x + 18 hope it helped =D

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3 years ago

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Jeff helped repair one half of the bicycles in a bike shop last week. If jeff worked on 5 bicycle, how many bicycles did the sho

denpristay [2]

The answer would be 10.

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2 years ago

Maria had 10.5 pounds of flour. She used all of the flour to fill bags that hold 0.75 pound each.

Papessa [141]

There are 16 oz per pound, so that 4 oz is equal to 4/16 or 1/4 pound.

Since each box contains 10 packages and each package weighs 3 lbs 4 oz which is equivalent to 3-1/4 lbs , then the weight of each box will be

(10 (3-1/4) = 32-1/2 pounds per box

The weight of 4 boxes will then be (4 boxes) (32-1/2 pounds per box) = 130 pounds.

8 0

2 years ago

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the frame of a picture is 28 cm by 32 cm outside and is of uniform width.What is the width of the frame if 192 cm2 of the pictur

natita [175]

Answer:

The width of the frame is equal to $8\ cm$

Step-by-step explanation:

Let

x-------> the width of the frame picture

we know that

$(28-2x)(32-2x)=192$

$896-56x-64x+4x^{2} =192$

$4x^{2}-120x+704=0$

Simplify

$x^{2}-30x+176=0$

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-30x+176=0$

so

$a=1\\b=-30\\c=176$

substitute in the formula

$x=\frac{30(+/-)\sqrt{(-30)^{2}-4(1)(176)}} {2(1)}$

$x=\frac{30(+/-)\sqrt{196}} {2}$

$x=\frac{30(+/-)14} {2}$

$x=\frac{30+14} {2}=22\ cm$ ----> this solution is not logic

$x=\frac{30-14} {2}=8\ cm$

The width of the frame is equal to $8\ cm$

8 0

3 years ago

A softball pitcher has a 0.507 probability of throwing a strike for each pitch. If the softball pitcher throws 15 pitches, what

Elena L [17]

Answer:

The probability that the pitcher throws exactly 8 strikes out of 15 pitches is approximately 0.199

Step-by-step explanation:

The given probability that the pitcher throws a strike, p = 0.507

The number of pitches thrown by the pitcher = 15 pitches

The probability that the pitcher does not throw a strike, q = 1 - P

∴ q = 1 - 0.507 = 0.493

By binomial theorem, we have;

$P(X = r) = \dbinom{n}{r}p^{r} \cdot q^{n-r}= \dbinom{n}{r}p^{r} \cdot \left (1-p \right )^{n-r}$

When X = r = 8, and n = 15, we get;

The probability that the pitcher throws exactly 8 strikes out of 15 pitches, P(8), is given as follows

P(8) = ₁₅C₈ × 0.507⁸ × (1 - 0.507)⁽¹⁵ ⁻ ⁸⁾ = 6,435 × 0.507⁸ × 0.493⁷ ≈ 0.199

8 0

3 years ago