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Phantasy [73]
2 years ago
9

please help with maths !

Mathematics
2 answers:
Margarita [4]2 years ago
8 0

Answer:

use Pythagoras theorem for this question because this is a right angled triangle

Anna11 [10]2 years ago
4 0

Answer:

4.91

Step-by-step explanation:

trying to find adjacent, you know the angle and hypotenuse, so use the CAH equation

cos(51) x 7.8 = 4.91 (3 s.f.)

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Can somebody help me out i’m struggling really badly
zhuklara [117]
The answer would be y = -4/7x + 2
6 0
2 years ago
The expression (n^14)(n^3) is equivalent to n^x<br> What is the value of x
Andre45 [30]

Answer:

17

Step-by-step explanation:

add the exponents

7 0
3 years ago
Read 2 more answers
On rainy days, Izzy goes from his house to the school by running 1.2 miles on West St, then makes a 90º turn and runs 0.5 miles
OlgaM077 [116]

Answer:

a) It will take Izzy 0.226 hours = 13.6 minutes = 13 minutes 36 seconds to run to school on dashed days.

b) Izzy runs 1.30 miles on dry days.

c) Izzy saves 3 minutes and 12 seconds cutting through the woods.

Step-by-step explanation:

This problem can be solved by a simpe rule of three problem.

a) On rainy days, she runs 1.2 + 0.5 = 1.7 miles.

The problem states that for rainy days, she runs 7.5 miles per hour. We know that in a hour, Izzy will run 7.5 miles. We want to know how long it takes for her to run 1.7 miles. So

1 hour - 7.5 miles

x hours - 1.7 miles

7.5x = 1.7

x = \frac{1.7}{7.5}

x = 0.226 hours

It will take Izzy 0.226 hours = 13.6 minutes = 13 minutes 36 seconds to run to school on dashed days.

b) Now we have a right triangle, where the sides are the 1.2 miles and the 0.5miles, and the path through the woods x is the hypotenuse.

So, we apply the pythagorean theorem.

x^{2} = (1.2)^{2} + (0.5)^{2}

x^{2} = 1.44 + 0.25

x^{2} = 1.69

x = 1.30

So, Izzy runs 1.30 miles on dry days.

c) The first step for this question is knowing how long it takes for Izzy to run 1.30 miles at 7.50 miles a hour. So:

1 hour - 7.50 miles

x hours = 1.30 miles

7.50x = 1.30

x = \frac{1.3}{7.5}

x = 0.173 hours

So, it takes Izzy 0.173 hours = 10.4 minutes = 10 minutes 24 seconds to run through the woods.

13' 36''

-10' 24''

3' 12''

Izzy saves 3 minutes and 12 seconds cutting through the woods.

5 0
3 years ago
Which expression has the same value as <br> 5<br> +<br> (<br> −<br> 4<br> )<br> 5+(−4)?
stellarik [79]

Answer: 5+-20-4 or -24+5 or -15-4

Step-by-step explanation: (5)+(−4)(5)+(−4) 5+-20-4 -24+5 or -15-4 -19

6 0
2 years ago
1. Suppose you invest $1000 at an annual interest rate of 4% compounded continuously. How much will you
BlackZzzverrR [31]
You take the 4% and multiply that by eight then you get 0.32 and you multiply that by 1000 and you get 320.00
4 0
3 years ago
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