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3 years ago

Make d the subject of the formula h= d/3 + 2

Mathematics

2 answers:

QveST [7]3 years ago

8 0

Answer:

d = 3h - 6

Step-by-step explanation:

$h = \frac{d}{3} + 2$

subtract 2 on all sides :

$(h) - 2 = (\frac{d}{3} + 2) - 2 \\ \\ h - 2 = \frac{d}{3}$

multiply 3 on all sides:

$(h - 2) \times 3= \frac{d}{3} \times 3 \\ \\ 3(h - 2) = d$

open bracket:

$d = 3h - 6$

Leni [432]3 years ago

5 0

Answer:

d= 3h-6

Step-by-step explanation:

h= d/3+2

h-2= d/3

d= 3(h-2)= 3h-6

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A supplier delivers an order for 20 electric toothbrushes to a store. By accident, three of the electric toothbrushes are defect

krek1111 [17]

Answer:

The probability that the first two electric toothbrushes sold are defective is 0.016.

Step-by-step explanation:

The probability of an event, say E occurring is:

$P (E)=\frac{n(E)}{N}$

Here,

n (E) = favorable outcomes

N = total number of outcomes

Let X = number of defective electric toothbrushes sold.

The number of electric toothbrushes that were delivered to a store is, n = 20.

Number of defective electric toothbrushes is, x = 3.

The number of ways to select two toothbrushes to sell from the 20 toothbrushes is:

${20\choose 2}=\frac{20!}{2!(20-2)!}=\frac{20!}{2!\times 18!}=\frac{20\times 19\times 18!}{2!\times 18!}=190$

The number of ways to select two defective toothbrushes to sell from the 3 defective toothbrushes is:

${3\choose 2}=\frac{3!}{2!(3-2)!}=\frac{3!}{2!\times 1!}=3$

Compute the probability that the first two electric toothbrushes sold are defective as follows:

P (Selling 2 defective toothbrushes) = Favorable outcomes ÷ Total no. of outcomes

$=\frac{3}{190}\\$

$=0.01579\\\approx0.016$

Thus, the probability that the first two electric toothbrushes sold are defective is 0.016.

8 0

3 years ago

Pls someone find the answer to this question...i have exam tomorrow

s2008m [1.1K]

Answer: 29.2cm

Step-by-step explanation: perimeter of parallelogram; 2(a + b) where a = base, b = altitude

a = 8cm

b = 6.6cm

Perimeter = 2(8 + 6.6) = 2(14.6)

Perimeter = 29.2cm

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3 years ago

There are 12 students in a homeroom wearing a school t-shirt these students make up 60% of the class how many students are in th

Yuki888 [10]

Answer:

there is a total of 20 students in the class because 60% of 20 is 12

Step-by-step explanation:

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Oksana_A [137]

The corresponding sides of the model and the actual bridge are in proportion because the two solids are similar.

The scale factor from the model to the actual bridge is 5/25 = 6/30 = 8/40 = 1/5.

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3 years ago

What does it mean if y values is the same

solong [7]

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3 years ago

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