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Volgvan
3 years ago
12

1. Rich wants to buy a coat priced at x dollars. It is on sale for 20% off. He must

Mathematics
1 answer:
alexandr1967 [171]3 years ago
6 0

Answer: x-0.20x+0.0725x

Step-by-step explanation:

Let x be the price. 20% (0.20) 7.25% (0.0725)

x-0.20x+0.0725x

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Which expression is equivalent to 4 times the sum of 3 and x
vovikov84 [41]

Answer:

4(3+x)

Step-by-step explanation:

If any thing is in the brackets you need to do it first

so if you do 3 + x × 4 it will give yo 4x + 3 or 3 +4x

8 0
3 years ago
What is the following product? StartRoot 10 EndRoot times StartRoot 10 EndRoot
pentagon [3]

Answer:

it's 10

Step-by-step explanation:

i searched it up.

5 0
3 years ago
Please help! A-level maths.
astra-53 [7]

x+y=k\implies y=k-x

Substitute this into the parabolic equation,

k-x=6-(x-3)^2\implies x^2-7x+(k+3)=0

We're told the line x+y=k intersects C twice, which means the quadratic above has two distinct real solutions. Its discriminant must then be positive, so we know

(-7)^2-4(k+3)=49-4(k+3)>0\implies k

We can tell from the quadratic equation that C has its vertex at the point (3, 6). Also, note that

-1\le\sin t\le1\implies3\le3+2\sin t\le5\implies3\le x\le5

and

-1\le\cos2t\le1\implies2\le4+2\cos2t\le6\implies2\le y\le6

so the furthest to the right that C extends is the point (5, 2). The line x+y=k passes through this point for 2+5=k\implies k=7. For any value of k, the line x+y=k passes through C either only once, or not at all.

So 7\le k; in set notation,

\{k\mid 7\le k

4 0
3 years ago
(will give brainliest)
professor190 [17]

Answer:

m + 10 = 39

Step-by-step explanation:

In 10 years she will be 39, so you will add 10 to her age right now, which is m, so m + 10 = 39

8 0
3 years ago
Read 2 more answers
Quare cm
Triss [41]
P=32cm
A= 64cm^2

Step by Step

Formula(Perimeter): P=s+s+s+s
S=side P=perimeter
P=8*4
P=32

Formula(Area for Square): A=s^2
A=Area s=side
A=8^2
A=84
3 0
3 years ago
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