All categories

2 years ago

Very hard problem someone help

Mathematics

1 answer:

miv72 [106K]2 years ago

7 0

Answer:

Everything in the box currently is correct but the bottom two numbers are just -3 and -4

Step-by-step explanation:

You might be interested in

workers have painted 920 square feet of an office they have completed 80% of their job how many square feet do they need to. pai

Sloan [31]

80% = 0.80

divide the area done by the percentage:

920/0.80 = 1150

total area is 1150 square feet

7 0

3 years ago

the scientist's collection that has granite that weighs 74 26/36 lbs, marble that weighs 63 16/34 lbs, and quartz that weighs 81

Viktor [21]

Answer:

(D)6 1/2 lbs

Step-by-step explanation:

$\text{Weight of the quartz = }81 \dfrac{9}{40} \text{ lbs}\\\dfrac{9}{40}=0.225 \\$Therefore:$ 81 \dfrac{9}{40} \approx 81.25\text{ lbs (to the nearest 1/4 lbs)}\\\text{Weight of the granite = }74 \dfrac{26}{36} \text{ lbs}\\ \dfrac{26}{36}=0.722 \\$Therefore:$74 \dfrac{26}{36} \approx 74.75\text{ lbs (to the nearest 1/4 lbs)}$

Difference = 81.25 - 74.75

=6.5 lbs

The correct option is D.

8 0

4 years ago

What is the slope of the line whose equation is 2x - 4y = 10?

sertanlavr [38]

Answer:

1/2

0.5

Step-by-step explanation:

you need to get the line in the form of y = mx + b

2x - 4y = 10 Subtract 3x from both sides

-4y = - 2x + 10 3x on the left disappears. Divide by - 4

-4y/-4 =-2x/-4 +10/-4 Do the division

y = (2/4)x - 2.5

y = (1/2)x - 2.5

The slope is the number in front of the x

y = 0.5x - 2.5

4 0

4 years ago

Read 2 more answers

Question 9 of 10<br> Which polynomial represents the difference below?<br> (8x2 +9) - (3x2 + 2x + 5)

koban [17]

Step-by-step explanation:

= (8x² + 9) - (3x² + 2x + 5)

= 8x² + 9 - 3x² - 2x - 5

= 5x² - 2x + 4

7 0

3 years ago

In a class of P students, the average of test scores is 70. In another class the average test scores is 92. When scores of the t

Basile [38]

So, since averages are defined as:

$\frac{\sum_{k=1}^{P} P_k}{P}=70$

So, since P are the total number of elements and P_k is the P_kth student. This is saying if we sum over each student's score and divide it by the number of students, we should get P, which is true.

So, using that logic, the other class can be represented as:

$\frac{\sum_{k=1}^{N} N_k}{N}=70$