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Masteriza [31]
3 years ago
10

Simplify to create an equivalent expression. -1 +81-5r - 2) I need help please!

Mathematics
1 answer:
GarryVolchara [31]3 years ago
7 0

Answer:

-1+81=(51r-2) is that the correct equation bc the one you have qritten is kinda confusing

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Dried bananas sell at $4.59/kg and dried apricots sell at $6.59/kg. How many of kilograms of each should be used to make a mixtu
vitfil [10]

Answer:

Weight of dried bananas = 34.75 kg

Weight of dried apricot = 15.25 kg

Step-by-step explanation:

Given that:

Cost of dried bananas = $4.59 per kg

Cost of dried apricots = $6.59 per kg

Total weight of mixture = 50 kg

Sales price of dried fruit = $5.20 per kg

To find:

The weight of each type of dry fruit = ?

Solution:

Let weight of dried bananas = x kg

Let weight of dried apricot = y kg

x+y=50 ...... (1)

Total cost of dried bananas = Cost of dried bananas per kg multiplied by weight of dried bananas

Total cost of dried bananas = $4.59x

Total cost of dried apricots = Cost of dried apricots per kg multiplied by weight of dried apricots

Total cost of dried apricots = $6.59y

As per question statement,

Total cost of dry fruits = $5.20 \times 50 = $260

260 = 4.59x+6.59y......(2)

Using <em>substitution:</em>

By equation (1):

x = 50-y

Putting in equation (2):

260 = 4.59 (50-y)+6.59y\\\Rightarrow 2y = 260 - 229.5\\\Rightarrow y = 15.25\ kg

x = 50 - 15.25\\\Rightarrow x = 34.75\ kg

Therefore, the answer is:

Weight of dried bananas = 34.75 kg

Weight of dried apricot = 15.25 kg

3 0
3 years ago
there are 3 teachers for every 17 students at a school. if there are 136 students, how many teachers are at the school?
rusak2 [61]

Answer:

24 teachers

Step-by-step explanation:

136 ÷ 17 = 8

8 × 3 = 24

4 0
3 years ago
Read 2 more answers
A person standing d=145 centimeters from a mirror notices that the angle of depression from his eyes to the bottom of the mirror
Serggg [28]

The length of the mirror is 64.52 cm

<u>Explanation:</u>

Given:

Distance of the person from the mirror = 145cm

Angle of depression = 14°

Angle of elevation = 11°

Vertical dimension of the mirror = ?

For angle of elevation:

tan(11) = \frac{AB}{BO}\\ \\0.195 = \frac{AB}{145} \\\\AB = 28.275 cm

For the angle of depression:

tan(14) = \frac{BC}{BO} \\\\0.25 = \frac{BC}{145} \\\\BC = 36.25 cm

Total length of the mirror, AC = AB + BC

                                              = 28.275 + 36.25cm

                                              = 64.52 cm

Therefore, the length of the mirror is 64.52 cm

7 0
4 years ago
AWNSER FOR 99 POINTS!What is the volume of the pyramid? A. 2470 cm3 B. 4940 cm3 C. 7410 cm3 D. 14,820 cm3
fgiga [73]
The answer is B.4940. I found the picture of the pyramid u forgot to post. The volume for pyramid is lwh/3
5 0
3 years ago
Read 2 more answers
I need help plsss. im stuck
noname [10]

Answer:

h = 6 cm

Step-by-step explanation:

Volume of cylinder = 54 π cm³

πr²h = 54π

π * 3 * 3 * h = 54π

h = \frac{54 \pi }{\pi *3*3}\\\\h= 6

6 0
3 years ago
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