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makkiz [27]
3 years ago
9

2 t-shirts and 3 hats costs £12.

Mathematics
1 answer:
Mariana [72]3 years ago
6 0

Answer:

Cost of tshirt = £7.29

Cost of what = £0.86

Step-by-step explanation:

2t +3h = 12; 10t + 15h = 60

5t + 4h =33; 10t + 8h = 66

15h -8h = -6

7h = -6; h = -6/7; h = 0.86

2t +3(-6/7) =12

14t -18 = 84

14t = 102; t = 102/ 14; t=7.29

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10(1 – 2y) = -5(2Y - 1)
mars1129 [50]

Answer:

y =1/2

Step-by-step explanation:

solve for ; y

10(1 – 2y) = -5(2Y - 1)

-10(2y-1) +5(2Y - 1) =0

(2y-1)(-10+5) = 0

-5(2y-1) =0

2y-1=0

y = 1/2

7 0
3 years ago
Read 2 more answers
What is the equation of a circle with center (9, -11) and the point (12, -15) on its circumfance
Hoochie [10]

Answer:

(x−9)2+(y+11)2=25

Step-by-step explanation:

hope that helps

8 0
3 years ago
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What is 51/99 in simplest form?
Reil [10]
[text \frac{51}{99} [/tex] is already simplified completely.
6 0
3 years ago
Heather is a student in a class that has been asked to conduct a hypothesis test for a population proportion. The null and alter
Rasek [7]

Answer:

Alan = reject H0

Bill = cannot say

Step-by-step explanation:

Given that Heather is a student in a class that has been asked to conduct a hypothesis test for a population proportion.

H0: p = 0.5 \\Ha: p ≠ 0.5

(two tailed test at 5% significance level)

Since she rejects null hypothesis p value should have been less than 0.05

when p value <0.05, it is definitely less than 0.10

So at 1% level of significance also the null hypothesis would be rejected.

So Alan also would get the same result as to reject the H0

But about Bill since Bill uses 0.01, we cannot definitely say that p value is less than or greater than 0.01

All we know is that p is less than 0.05

Hence it is impossible to tell from the information for Bill

5 0
3 years ago
Please help, struggling
IrinaK [193]

Answer:

x ≈ 6.6 cm

Step-by-step explanation:

The Pythagorean theorem applies. The sum of the squares of the legs of this right triangle equals the square of the hypotenuse:

x^2 + 13.5^2 = (x+8.45)^2

x^2 +182.25 = x^2 +16.9x +71.4025

110.8475 = 16.9x . . . . . subtract x^2 +71.4025

6.559024 = x . . . . . . . .divide by 16.9

The value of x is about 6.6 cm.

8 0
3 years ago
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