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MissTica
3 years ago
5

What math do you mainly need to know in 7th grade

Mathematics
2 answers:
alexandr1967 [171]3 years ago
8 0
You need algebra, aka 2x+4-5y. things like that
sukhopar [10]3 years ago
8 0
It depends what math you're in (Advanced or Regular). I would say knowing the basic concepts of pre-algebra and fractions should be down by this time.

Hipe this helps!
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What is 300.5 × -0.2​
schepotkina [342]

Answer:

(300.5) * (-0.2)

equals -601

7 0
3 years ago
FInd the X- and the Y-intercept of the line.
Maurinko [17]
A. You divide 1 (infront of x) by 12 to get 12. You divide -6 by 12 to get -2 for the y intercept.
6 0
3 years ago
Read 2 more answers
The length of a rectangle is increasing at a rate of 6cm/s and its width is increasing at a rate of 3cm/s. When the length is 20
castortr0y [4]

Answer:

150 cm/s

Step-by-step explanation:

We have that the area of a rectangle is as follows:

a = l * w

they ask us to change the increase in area with respect to time, therefore, if we derive with respect to t we are left with:

da / dt = w * (dl / d) t + l * (dw / dt)

From the statement we know that:

l = 20 cm

w = 15 cm

dl / dt = 6 cm / s

dw / dt = 3 cm / s

replacing each value we have:

da / dt = 15 * 6 + 20 * 3

da / dt = 150

Which means that 150 cm / s increases the area of the rectangle in relation to time

7 0
3 years ago
Which pair of angle measures satisfy the condition sin J = cos K? A. 15°, 40° B. 45°, 90° C. 60°, 30° D. 80°, 100° E. 70°, 110°
vaieri [72.5K]
Sin J = cos K
sin J = cos (90 - J)
K = 90 - J

sin 60 = cos (90 - 60) = cos 30

Therefore, 60°, 30° satisfy the condition sin J = cos K.
8 0
3 years ago
Please help with this.
jek_recluse [69]
Hello,

When you have an polygon inscribed in a circle, the opposite angles are supplementary.

Therefore, we can write and solve the following equation.
2x + 3 + 4x + 3 = 180
6x = 174
x = 29

If you substitution 29 into the expression for C, you will find that C = 59.
2(29) + 1 = 59

Good luck,
MrEQ
7 0
3 years ago
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