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3 years ago

9TH GRADE MATH. PLEASE HELP. PLEASE.

Mathematics

1 answer:

Mumz [18]3 years ago

3 0

Answer:

Step-by-step explanation:

x3 to x4 rate of change is 8

x4 to x5 rate of change is 16

8+16 is 24 divided by 2 to fond the average and u get 12

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Leg = 11 meters, Hypotenuse = 15 meters

Gnom [1K]

Answer:

10.19

Step-by-step explanation:

Use the Pythagorean Theorem:

$a^{2}+b^{2}=c^{2}$

Substitute the numbers given:

$11^{2}+b^{2}=15^{2}$

$121+b^{2}=225\\ b^{2}=225-121\\ b^{2}=104\\ \sqrt b^{2}= \sqrt{104} \\ b=10.19$

8 0

2 years ago

8x = 2y + 5 3x = y + 7

tamaranim1 [39]

Hello there!

8x = 2y + 5
3x = y + 7
Use the substitution property
We need to solve 3x = y + 7 for y
3x = y + 7
3x - y = 7
-y = 7 - 3x
Divide both sides by -1
-y/-1 = -3x -7/-1
y = 3x - 7
Substitute 3x - 7 for y in 8x = 2y + 5
8x = 2y + 5
8x = 2(3x - 7) + 5
8x = 6x - 14 + 5
8x = 6x - 9
8x - 6x = -9
2x = -9
x= -9/2
To find y, we need to substitute -9/2 for x in y = 3x -7
y = 3x - 7
y = 3(-9/2) - 7
y = -41/2

The correct answer is option A (-9/2; -41/2)

Good luck with your studies!

8 0

4 years ago

Frank mary and seth shared some sweets in the ratio 4:5:7 seth got 18 more sweets than frank

Nimfa-mama [501]

Answer:

each number in the ratio 4:5:7 is worth 6 sweets. add 4,5, and 7 to get 16 then multiply it by 6 to get 96 sweets.

Step-by-step explanation:

add the ratios = 4+5+7= 16

1 number = 6 so

4x6= 24

5x6=30

7x6=42

Frank gets 24 sweets

Mary gets 30 sweets

Seth gets 42 sweets

The total number of sweets they shared is 24+30+42= 96

The share 96 sweets altogether.

The check your answer; do 42-24= 18

Therefore, now we know that the difference between Seth and Frank's amount of sweets is 18.

Therefore, this is correct.

5 0

3 years ago

WILL MARK BRAINLIEST IF ANSWERED CORRECTLY (SHOW YOUR WORK)

damaskus [11]

Answer:

One solution -> x = 35 , y = -25

Step-by-step explanation:

Solve the following system:

{14 x + 7 y = 315 | (equation 1)

16 x - 2 y = 610 | (equation 2)

Swap equation 1 with equation 2:

{16 x - 2 y = 610 | (equation 1)

14 x + 7 y = 315 | (equation 2)

Subtract 7/8 × (equation 1) from equation 2:

{16 x - 2 y = 610 | (equation 1)

0 x+(35 y)/4 = (-875)/4 | (equation 2)

Divide equation 1 by 2:

{8 x - y = 305 | (equation 1)

0 x+(35 y)/4 = -875/4 | (equation 2)

Multiply equation 2 by 4/35:

{8 x - y = 305 | (equation 1)

0 x+y = -25 | (equation 2)

Add equation 2 to equation 1:

{8 x+0 y = 280 | (equation 1)

0 x+y = -25 | (equation 2)

Divide equation 1 by 8:

{x+0 y = 35 | (equation 1)

0 x+y = -25 | (equation 2)

Collect results:

Answer: x = 35 , y = -25

6 0

3 years ago

The revised Daily Value for calcium is 1,300 mg per day. How many servings of this food would you have to eat to get 100% DV for

Ne4ueva [31]

Answer:

Taking into account the values showed for this food (image attached). It is required

Servings.

Step-by-step explanation:

The total calcium (Cat) required is 1300 mg/day.

One serving of this food can have 260 mg.

First step is to suppose one day of calculation. t = 1 day.

Cat = (1300 mg/day)(1 day) = 1300 mg Calcium.

One single serving can have 260 mg Calcium (Cas). So, we need to calculate the amount of servings (N) required to complete 1300 mg.

Cat = Cas*N

N = Cat/Cas = 1300 mg/260mg

N = 5.

Finally amount of servings is five N = 5.

8 0

4 years ago