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alina1380 [7]
2 years ago
13

Please help i need help

Mathematics
1 answer:
valentinak56 [21]2 years ago
4 0

Answer:

Step-by-step explanation:

21.

Your friend is wrong here. When they multiply by 3 in the second line, they need to ensure that every term is multiplied by 3. Although they have multplied x/3 and 6 by 3, they did not multiply 4 by 3.

The correct answer would be:

⇒ x + 12 < 18

⇒ x < 6

22.

Here your friend is wrong again. When they exapnd the bracket on the left hand side, they do not multiply all terms inside the bracket by 3. Although they have multplied w by 3, -2 has not been multiplied.

The correct answer would be:

⇒ 3w - 6 ≥ 10

⇒ 3w ≥ 16

⇒ w ≥ 16/3

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Simon makes 30 cakes
tankabanditka [31]

Answer:

21

Step-by-step explanation:

10% of 30 is 3 then 1/5 of 30 is 6 so 3+6=9 then 30-9=21

5 0
4 years ago
On a road map that uses a scale of 1inch:20 miles, two cities are 7 inches apart. if you are making a map that uses a scale of 3
Lady bird [3.3K]
Well, we know that there are 2 cities. The original map is having 1 inch represent 20 miles. The cities are 7 inches apart. First off, you need to know how far apart in MILES they are.

20*7=140, so the cities are 7 inches apart, or 140 miles.

So, you want to make an identical map, but you want your measurements to be a bit more spaced. we know YOUR map will have every 3 inches representing 35 miles, but we need to know how far apart in inches will 140 miles be.
Well, we simply take 140 and divide it by 35 then!
140/35=4
Wait, your not done yet, The 4 only represents how many "35 mile" increments you need to get to 140. This means the number representing inches also has to be multiplied by this 4 to get your final answer.
3*4=12
This means on YOUR map, the 2 cities will be 12 inches apart.

~Hope this helps!
7 0
4 years ago
Read 2 more answers
What is the vertex of the graph y= x^2 + 6x - 5
Rashid [163]

we are given

y= x^2 + 6x - 5

Firstly ,we can find equation in vertex form

so, we will complete x square

y= x^2 + 6x+3^2-3^2 - 5

y= (x+3)^2-3^2 - 5

y= (x+3)^2-14

now, we can compare it with vertex form of equation

y= (x-h)^2+k

we can find h and k

h=-3 , k=-14

so, vertex is

(h,k)=(-3,-14).............Answer

6 0
3 years ago
Find the smaller of 2 consecutive intergers, x, if the sum of the smaller and 6 times the larger is -29. Write an equation to de
Irina18 [472]

Answer:

x = -5 and x+1( consecutive integer) = -4

obviously x is smaller than the next integer

Step-by-step explanation:

Let the first integer be x

hence the consecutive integer is x +1

according to the give condition

x + 6(x + 1) = -29

x + 6x + 6 = -29

7x = -29 -6

7 x = -35

x = -35/7

x = -5

x + 1 = -5 + 1 = -4

GOOD LUCK FOR THE FUTURE! : )

8 0
3 years ago
Which equation is not a linear equation?
Julli [10]

Answer:

the answer is c  x^4

Step-by-step explanation:  

HI.....

liner equation mean that the  power of   the variables in equation  is 1

x^4 =  the power of variable x is 4  so  non linear  

Good luck

4 0
3 years ago
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