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nexus9112 [7]
2 years ago
9

Idk know the answer

Mathematics
2 answers:
aniked [119]2 years ago
7 0

Answer:

X=70

Step-by-step explanation:

We know from the equation that you can take X and divide it by 10 to get 7. So we just have to reverse this process:

what's 7 * 10?

70

X=70

Vanyuwa [196]2 years ago
5 0

Step-by-step explanation:

\frac{x}{10}  = 7

x = 7 ×10

x = 70

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Ian measured a city park and made a scale drawing. In real life, the soccer field is 114 meters long. It is 19 millimeters long
ioda

Answer:

1 mm : 6 m

Step-by-step explanation:

Take the 19 mm and divide it by 114 meters. to get the scale

19/114  =  1/6

1 mm : 6 meters

8 0
3 years ago
Jeany bought 12 postcards which was twice as many postcards as joe bought. Ruth bought 3 times as many postcards as joe. How man
nasty-shy [4]

Answer:36 postcards

Step-by-step explanation:

jenny bought 12 post cards

joe bought half of the postcards jenny bought = 12/2 = 6

ruth bought 3 times the postcards joe bought = 3 x 6 = 18

total postcards bought by all = 12 + 6 + 18 = 36 postcards

8 0
3 years ago
Read 2 more answers
Data consistent with summary quantities in the article "Effects of Fast-Food Consumption on Energy Intake and Diet Quality Among
Olegator [25]

Answer:

a) X[bar]₁=  1839.20 cal

b) X[bar]₂= 1779.07 cal

c) S₁= 386.35 cal

Step-by-step explanation:

Hello!

You have two independent samples,

Sample 1: n₁= 15 children that did not eat fast food.

Sample 2: n₂= 15 children that ate fast food.

The study variables are:

X₁: Calorie consumption of a kid that does not eat fast food in one day.

X₂: Calorie consumprion of a kid that eats fast food in one day.

a)

The point estimate of the population mean is the sample mean

X[bar]₁= (∑X₁/n₁) = (27588/15)= 1839.20 cal

b)

X[bar]₂= (∑X₂/n₂)= (26686/15)= 1779.07 cal

c)

To calculate the sample standard deiation, you have to calculate the sample variance first:

S₁²= \frac{1}{n_1-1}[∑X₁² - (( ∑X₁)²/n₁)]= \frac{1}{14} + [52829538 - (\frac{27588^{2} }{15}) = 149263.4571 cal²

S₁= 386.35 cal

I hope it helps!

7 0
3 years ago
You need to split it in half then multply then add
Harrizon [31]

Answer:

130^2 or 130 meters squared

Step-by-step explanation:

I decomposed the figure, then found the area of the decomposed figures then found the sum of them.

FIGURE A:

3 x 3 = 9

= 9^2

FIGURE B:

11 x 11 = 121

= 121 meters^2

So 121 + 9 = 130

= 130 meters^2

REMEMBER!!!!

THE FORMULA FOR AREA IS LENGTH * WIDTH = AREA

8 0
2 years ago
150% of what number is 40.
Crazy boy [7]

Solution for what is 150% of 40 40/x=100/150 (40/x)*x=(100/150)*x - we multiply both sides of the equation by x 40=0.666666666667*x - we divide both sides of the equation by (0.666666666667) to get x 40/0.666666666667=x 60=x x=60 now we have: 150% of 40=60

8 0
3 years ago
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