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Zielflug [23.3K]

4 years ago

7

A painter can paint 350 square feet in 1.25 hours. What is the painting rate per square feet per hour?

1 answer:

Andrei [34K]4 years ago

5 0

Answer:

280

Step-by-step explanation:

350÷5 will give you quarters. 350÷50=70. 70x4=280

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Which values represent the first two terms of the sequence a1=2 and an=-4(an-1)^2?

cricket20 [7]

<span>a1= (which is the first term.)
to find the 2nd term you plug in 2 for (an) in the formula given to you. =-4(2-1)^2 *remember an represents the term u are looking for *
now you start to solve it
-4(2-1)^2
-4 (1)^2 .
-4^2 = 16
so your first two terms are 2 and 16 .</span>

4 0

4 years ago

Talia tossed a penny many times. She got 30 heads and 70 tails. She said the experimental probability of getting heads was 30 70

-BARSIC- [3]

Answer:

The experimental probability of landing on heads is 0.3

Step-by-step explanation:

We are given the following in the question:

Number of heads = 30

Number of tails = 70

Talia said the probability of getting heads is $\frac{30}{70}$ .

She evaluated the wrong probability.

She did not considered total number of trials in the experiment.

Formula for probability:

$\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}$

Probability of heads =

$P(H) = \dfrac{30}{30+70} = \dfrac{30}{100} =0.3$

The experimental probability of landing on heads is 0.3

4 0

3 years ago

Find the product of ( 2a2– 3b2) and ( a +b2- 3z)

Bond [772]

Answer:

$2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z$

Step-by-step explanation:

$(2a^2-3b^2)(a+b^2-3z)$

Start by distributing the $2a^2$ into all of the terms in between the second parentheses.

$2a^3+2a^2b^2-6a^2z$

Next, distribute the $-3b^2$ into all of the terms in between the second parentheses.

$-3ab^2-3b^4+9b^2z$

For the sake of simpler interpretation, I separated the two above, but they are together:

$2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z$

Since the terms are already in descending order, we do not need to rearrange them.

4 0

3 years ago

How many circles of radius 1 can fit into circle of radius 500?

Gekata [30.6K]

using 3.14 for Pi , since you didn't say what value to use

area = PI x r^2

Area of larger circle = 3.14 x 500^2 = 785,000 square units

area of smaller circles = 3.14 x 1^2 = 3.14 square units

785,000/ 3.14 = 250,000 small circles can fit into larger one

6 0

4 years ago

Find the value of x<br> 90<br> (2x+3)<br> 90<br> 119

Virty [35]

Answer:

x=-61

Step-by-step explanation:

For parallelograms you always have the sum as 180,

You get 90+90+2x+3+119=180, then solve!

5 0

2 years ago