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3 years ago

It is 7 miles from Tina's house to the library and 6 miles from the library to the

Mathematics

1 answer:

gayaneshka [121]3 years ago

6 0

It would take tina 4.2
what i did was i multiplied 7x6=42
then i divided 42 with 10
42/10=4.2
so it’ll take tina 4.2 miles

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A taxi service charges a flat fee of $4.20 per ride plus an additional $0.80 per mile.if a taxi ride costs $6.60, how many miles

Setler [38]

The answer is: x miles = $\frac{6.60-4.20}{0.80} = 3$ miles

7 0

3 years ago

What is 7=b/11 what is b

alina1380 [7]

7 = b/11

11 × 7 = 77

Answer:

b = 7

7 0

3 years ago

Read 2 more answers

5.b) If z^(1/2)=x^(1/2)+y^(1/2) , show that (x+y-z)^2=4xy

Rudik [331]

Answer:

Step-by-step explanation:

(x+y-z)²= 4xy
(x+y-z)²- 4xy = 0
(x+y-z)²-(2√x√y)² = 0
(x+y-z-2√x√y)(x+y-z+2√x√y) =0
[(√x-√y)²-z]*[(√x+√y)²-z]=0
(√x-√y)²-z = 0 or (√x+√y)²-z = 0

We have : z^(1/2)= x^(1/2)+y^(1/2) ⇒ √z = √x + √y ⇒ z = (√x + √y)²

so (√x+√y)²-z = 0

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3 0

3 years ago

Verify:<br>cos(2A)=(cotA-tanA)/cscAsecA

kolbaska11 [484]

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identities

cot A = $\frac{cosA}{sinA}$ , tanA = $\frac{sinA}{cosA}$ , cscA = $\frac{1}{sinA}$ , secA = $\frac{1}{cosA}$

Consider the right side

$\frac{cotA-tanA}{cscAsecA}$

= $\frac{\frac{cosA}{sinA}-\frac{sinA}{cosA} }{\frac{1}{sinA}.\frac{1}{cosA} }$

= $\frac{\frac{cos^2A-sin^2A}{sinAcosA} }{\frac{1}{sinAcosA} }$

= $\frac{cos^2A-sin^2A}{sinAcosA}$ × sinAcosA ( cancel sinAcosA )

= cos²A - sin²A

= cos2A

= left side ⇒ verified

5 0

3 years ago

Can someone please help me with this.

Doss [256]

F(a)= -3a+2b

Hope this helps!

6 0

3 years ago