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2 years ago

Please help. Answer only if you know the correct answer. I’ll mark you as brainliest if correct.

Mathematics

2 answers:

zavuch27 [327]2 years ago

8 0

Answer:

37 miles an hour

Step-by-step explanation:

you set up a ratio

100/62 on left 60/x on right

cross mult and get 100x=60(62)

100x=3720

x= 37.2

aksik [14]2 years ago

7 0

Answer:

Step-by-step explanation:

If the speed is 100 km and is equivalent to 62 mph then 100/62 is 1.612903.

We can then divide 60 by 1.612903 to get 37

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(-4)^2=

Lunna [17]

Answer:

Step-by-step explanation:

raise -4 to the power of 2

=16

6 0

1 year ago

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In the diagram, find the values of a and b.

uysha [10]

Answer:

Step-by-step explanation:

∠a is alternate interior angle to ∠ECD

∠b is alternate interior angle to ∠BCD

so:

If AB || CD then:

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8 0

2 years ago

Factor 16x^2 + 49. Check your work.

Shtirlitz [24]

Answer:

$16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

Step-by-step explanation:

Given : Expression $16x^2+49$

To find : Factor the expression ?

Solution :

The given expression is a quadratic function $y=ax^2+bx+c$ the solution is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

On comparing with general form,

a=16, b=0, c=49

Substitute in the formula,

$x=\frac{-0\pm\sqrt{0^2-4(16)(49)}}{2(16)}$

$x=\frac{\pm\sqrt{-3136}}{32}$

$x=\frac{\pm56i}{32}$

$x=\frac{56i}{32},\frac{-56i}{32}$

$x=\frac{7i}{4},\frac{-7i}{4}$

Factors are $(x-\frac{7i}{4}),(x+\frac{7i}{4})$

Therefore, $16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

4 0

3 years ago

Find the midpoint of R(-4, 5) and S(3, 3).

maw [93]

The answer would be (-1,2)

5 0

3 years ago

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A recipe requires sugar, flour and cocoa in the ratio 5:4:1

WARRIOR [948]

Let x be the amount of cocoa you use in the recipe.

then 4x is the amount of flour used, and 5x is the amount sugar used.

x+4x+5x= 550g
10x=550g
x=55g

So, you use 55g of cocoa, 220g of flour, and 275g of sugar.

hope this helps! :)

3 0

2 years ago