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3 years ago

Help please due in. 20 minutes

Mathematics

2 answers:

vladimir2022 [97]3 years ago

8 0

Answer: (1,5) = No

(0,7) = yes

(-3,-6) no

Step-by-step explanation:

(1,5) is outside the double shaded region and (-3,-6) is on the dash lined therefore its ruled outside as well

34kurt3 years ago

5 0

Answer:

B is a solution, A and C are not

Step-by-step explanation:

You might be interested in

Sample of 3 items is selected at random from a box containing 20 items of which 4 aredefective. find the expected number of defe

azamat

That's 54 I think. 20x3=60-4=54

6 0

4 years ago

32% of what number is 56

attashe74 [19]

Let 32% of x = 56

32%*x = 56
32/100 *x = 56
x = 56*100/32
x = 5600/32 = 175

hence, 32% of 175 is 56.

5 0

3 years ago

Adam, Barry, and Charles visited a small farmers market last Saturday. Adam purchased 3 dozen eggs, 1 wheel of cheese, and 5 pou

evablogger [386]

Answer:

A pound of potato costs $3.10

A dozen egg costs $5.5

A wheel of cheese costs $6.25

Step-by-step explanation:

Represent

- a dozen egg with D

- a wheel of cheese with W

- a pound of potato with P

For Adam:

$3D + W + 5P = 38.25$ ---- (1)

For Barry:

$D + 10P = 36.50$ ---- (2)

For Charles:

$2D + 2P = 17.20$ ---- (3)

Make D the subject in (2)

$D = 36.50 - 10P$

Substitute 36.50 - 10P for D in (3)

$2(36.50 - 10P) + 2P = 17.20$

$73 - 20P + 2P = 17.20$

$73 - 18P= 17.20$

Collect Like Terms

$- 18P= 17.20 - 73$

$- 18P= -55.8$

$18P= 55.8$

Solve for P

$P = 55.8/18$

$P = 3.1$

Substitute 3.1 for P in $D = 36.50 - 10P$

$D=36.50 - 10 * 3.1$

$D=36.50 - 31$

$D=5.5$

Substitute 3.1 for P and 5.5 for D in $3D + W + 5P = 38.25$

$3(5.5) + W + 5(3.1) = 38.25$

$16.5 + W + 15.5 = 38.25$

Solve for W

$W = 38.25 - 16.5 - 15.5$

$W = 6.25$

8 0

3 years ago

J=UC solve for c please

mart [117]

»»————-　★　————-««

I believe your answer is:

$c=\frac{j}{u}; u\neq 0$

»»————-　★　————-««

Here’s why:

⸻⸻⸻⸻

$\boxed{\text{Solving for 'c'...}}}\\\\j = uc \\------------\\\rightarrow \frac{j=uc}{u}\\\\\rightarrow \frac{j}{u}=c\\\\\rightarrow \boxed{c=\frac{j}{u}}}; u\neq 0$

⸻⸻⸻⸻

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

8 0

3 years ago

A boat traveled 280 miles downstream and back. The trip downstream took 7 hours. Trip back took 14 hours. What is the speed of t

nexus9112 [7]

Speed of the boat = u
speed of the current = v

In downstream,
u - v = 280/7
u - v = 40

In upstream,
u + v = 280/14
u + v = 20

Add both equations
2u = 60
u = 30

v = -10

Speed of the boat = 30 km/h

6 0

3 years ago