Miss lin bought 40 berry,strawberry,chocolate cookies.The ratio of number of berry cookie,strawberry cookie, chocolate cookie was 7;5;8.find the number of chocolate cookies.

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Explanation:

Use of a calculator makes quick work of this type of problem

5.25 + 2.98 = 8.23

10.00 - 8.23 = 1.77

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If you want to do this using mental math, then one trick is to do this:

Think of 2.98 as 3.00, then add this to 5.25 to get 8.25. Notice that we're 2 cents too high (because of the jump from 2.98 to 3.00), so we need to subtract 2 cents from 8.25 to get 8.23

So that's a fairly quick way to add those two numbers in your head. The more practice you get, the quicker it will happen.

As for the subtraction part, you have a number of routes. Possibly a quick way is to jump from 23 cents to 30 cents (plus 7), then jump from 30 cents to 100 cents (plus 70). Therefore, we have 7+70 = 77 as the overall jump to get us to the nearest dollar. But we'll need one more extra dollar to end up at $10 exactly.

In other words, the "plus 77 cents" portion only gets us from $8.23 to $9, so that's why we need that extra dollar in change. Therefore, we've computed $1.77

I apologize for being a bit wordy. Despite being a bit long-winded, this mental math should come fairly quickly after enough practice.

Answer:x + (x +1) + (x +2)= 30.

Step-by-step explanation:Consecutive means one right after the other--such as 4,5,6. So the sum (add all the numbers together) must equal 30. So the equation should read

Hope this helps!

Answer:

The Answer is Option 3

Step-by-step explanation:

I got it right edge 2022

The score John must have on his final exam in order to finish the class with an average of at least 90% is 62%.

In order to determine the score the that John must have in order to make an average of at least 90%, we have to determine the total sum of the scores he already has.

Sum of scores he already has = 87% + 95% + 92% + 89% + 84% = 447

Sum of scores he must have at the end of his sixth test = Average he must have on his average at the end of his final exam x number of exams written. 90 x 6 = 540

In order to determine the score John must have subtract 447 from 540. Divide the answer by 1.5.

540 - 447 = 93%

93 / 1.5 = 62%

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A similar question was answered here:

Answer:

C

Step-by-step explanation:

Answer:

Angle AOB measures 39°

Step-by-step explanation:

180-(90+51)=39

Answer:

-40

Step-by-step explanation:

5*(-8)*1-(-8*0)

-40+0

-40

Answer:

4

Step-by-step explanation:

8/2=4

Answer:

Step-by-step explanation:

The sum of -1 3/4 and 2 1/2:

The difference between 2 1/2 and 1 3/4:

This is same as well as:

Answer:

[tex]yes...his \: \: statement \: \: is \: \: correct[/tex]

Step-by-step explanation:

Sum of the given 2 numbers

[tex] - 1 \frac{3}{4} + 2 \frac{1}{2} \\ - \frac{7}{4} + \frac{5}{2} \\ - \frac{7}{4} + \frac{5 \times 2}{2 \times 2} \\ - \frac{7}{4} + \frac{10}{4} \\ \frac{ - 7 + 10}{4} \\ = \frac{3}{4} [/tex]

Difference between the given 2 numbers

[tex]2 \frac{1}{2} - 1\frac{3}{4} \\ \frac{5}{2} - \frac{7}{4} \\ \frac{5 \times 2}{2 \times 2} - \frac{7}{4} \\ \frac{10}{4 } - \frac{7}{4} \\ \frac{10 - 7}{4} \\ = \frac{3 }{4} [/tex]

So, It's clear to you that,

sum of -1 3/4 and 2 1/2 is the same as the difference between 2 1/2 and 1 3/4.

Hope this helps you.

Let me know if you have any other questions :-):-)

Given-

Cost of milk 4 years ago = £1.05

To find-

Percentage increase in cost

Solution-

Increase in cost = £ ( 1.26 - 1.05 )

→ £ 0.21

Percentage increase :-

[tex] \frac{0.21}{1.05} \times 100[/tex]

[tex]→ 20[/tex]

Therefore, Percentage increase of the cost of milk over 4 years is 20% .

✍️ By Benjemin ☺️

Rate of change=1.26-1.05=£0.31

Now percentage of change

[tex]\\ \sf\longmapsto \dfrac{0.21}{1.05}\times 100[/tex]

[tex]\\ \sf\longmapsto \dfrac{100}{5}[/tex]

[tex]\\ \sf\longmapsto 20\%[/tex]

Net earnings mean the total of.

-225.98 + 82.75 is saying that they spent 225.98 on supplies and made 82.75

-143.23 is the result you get:

Answer:

yes it is a Ploynomial

Step-by-step explanation:

Answer:

yes it is a polynomial

Step-by-step explanation:

with

Degree = 4

Leading Coefficient = 2

constant term = 0

Answer:

X=40 (corresponding angles m parallel to n)

y=40 (vertically opposite angles are equal in size)

■. What is asked: It asks us to find out the greatest number of marbles that rey can put equally inside each box.

■. What is it's Solution:

■. Now the Solution Starts:

Things you should know about:

If you find anymore doubts regarding on my answer. then plz send your queries to the comment section. i will help you ;))

Answer:

x = 3

Step-by-step explanation:

Let's solve your equation step-by-step.

4x+3=7x−6

Step 1: Subtract 7x from both sides.

4x+3−7x=7x−6−7x

−3x+3=−6

Step 2: Subtract 3 from both sides.

−3x+3−3=−6−3

−3x=−9

Step 3: Divide both sides by -3.

-3x ÷ -3 = x

-9 ÷ -3 = 3

x = 3

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Answer: Communitive property of addition

Step-by-step explanation:

The communitive property states that if you reverse the order of a multiplication or addition problem you will get the same result.

communitive property examples

x + 2 = 2 + x

xy = yx

Answer:

x=30

Step-by-step explanation:

if 30 x 4 = 120 amd 2 = 30 = 60 then 60+120=180

Answer:

A

Step-by-step explanation:

As those two lines are parallel, we can express and equation:

[tex]2x + 10 = 5x - 35[/tex]

[tex]5x - 2x = 10 + 35[/tex]

[tex]3x = 45[/tex]

[tex]x = 15[/tex]

Answer:

(5x-3)(8x-5)

Step-by-step explanation:

(5x-3)²-(3x-2)(3-5x)=(5x-3)²-(3x-2)[-(5x-3)]

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

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

                              =(5x-3)(8x-5)

y = 110

X = 80

angle b is the same value as y so the value of that is 110

Kite total angle must be 360 so if you add 110+110+60 will give you 280. Minus that with 360 will give you X which is 80.

Step-by-step explanation:

just think a little bit.

the balloon goes down 140 feet per minute.

how many feet will it have descended after 2 minutes ?

twice as much, right ?

after 5 minutes ? 8 minutes ? 10 minutes ? 15 minutes ?

we have to multiply.

simply because we need to maintain the value of the ratio feet/minute at all times.

so, when we multiply the "minute" part (by saying e.g. 5 minutes), we need to multiply the "feet" part with the same factor to keep the overall ratio the same. and then the resulting "feet" part gives us the answer.

so, after 2 minutes that means

140 ft / 1 min × 2/2 = 280 ft / 2 min

=> it descended 280 ft.

so, it's height is then at that moment

2520 - 280 = 2240 ft

5 minutes

140 ft / 1 min × 5/5 = 700 ft / 5 min

=> it descended 700 ft.

so, it's height is then at that moment

2520 - 700 = 1820 ft

and so on.

we see, that the general equation to determine the actual height (h) of the balloon depending on the passed number of minutes (m) is then

h = 2520 - 140m

so

2520 - 140×2 = 2240 ft

2520 - 140×5 = 1820 ft

2520 - 140×8 = 1400 ft

2520 - 140×10 = 1120 ft

2520 - 140×15 = 420 ft

Answer:

I think is The second one

Step-by-step explanation:

Option B is correct, the equation of the parabola in vertex form is y = 4(x - 5)² - 3.

A parabola is a U-shaped plane curve where any point is at an equal distance from a fixed point and from a fixed straight line which is known as the directrix.

We can start by using the vertex form of the equation of a parabola, which is given by:

y = a(x - h)² + k

where (h, k) is the vertex of the parabola and a determines the shape and direction of the opening of the parabola.

We are given that the vertex is (5, -3),

Substitute h = 5 and k = -3:

y = a(x - 5)² - 3

We also know that the parabola passes through the point (6, 1), so we can substitute x = 6 and y = 1:

1 = a(6 - 5)² - 3

1 = a - 3

a = 4

Substituting a = 4 into the equation

y = 4(x - 5)^2 - 3

Hence, the equation of the parabola in vertex form is y = 4(x - 5)² - 3.

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Answer:

y + 7 = 2/5 (x + 4)

Step-by-step explanation:

y + 7 = 2/5 (x + 4)